1. A tractor comprising:
a driver seat on which a driver can sit; and
5 an antenna unit that receives satellite positioning information,
wherein when viewed from the front, an upper end portion of a rollover protection structure (ROPS) and at least part of the antenna unit overlap with each other.
10 2. The tractor according to claim 1,
wherein the ROPS has right and left vertical frame portions and a lateral frame portion that joins upper ends of the right and left vertical frame portions to each other, and
when viewed from the front, at least part of the antenna unit and at least 15 part of the lateral frame portion overlap with each other.
3. The tractor according to claim 2, wherein the ROPS is provided to the
rear of the driver seat.
20 4. The tractor according to claim 2 or 3, further comprising:
right and left raising/lowering link mechanisms that are provided in a rear part of the vehicle body and raise/lower a working device,
wherein the antenna unit is provided between a rear end portion of the driver seat and a rear end portion of the right and left raising/lowering link 25 mechanisms in a side view.
5. The tractor according to claim 4, wherein the antenna unit is provided
between the right and left raising/lowering link mechanisms in a plan view.
30 6. The tractor according to any one of claims 2 to 5, further comprising:
a support member extending forward or rearward from the lateral frame portion and supporting the antenna unit,
wherein wiring that connects the antenna unit and a controller for
traveling control is drawn out from a wiring take-out position of the antenna unit
35 at a high position, and this wiring is held by the support member or the lateral
frame portion at an intermediate position between the antenna unit and the lateral

frame portion.
7. The tractor according to claim 6, wherein the support member has a
mounting face on which the antenna unit is mounted, reinforcement frames are
5 erected on both right and left ends of the mounting face, and the antenna unit is disposed at an intermediate position between the right and left reinforcement frames.
8. The tractor according to any one of claims 2 to 7, further comprising:
10 wiring that connects the antenna unit and a controller for traveling
control,
wherein the wiring is routed along the vertical frame portion.
9. The tractor according to claim 8, wherein
15 the vertical frame portion is hollow, and
the wiring is routed so as to pass through the inside of the vertical frame portion.
10. The tractor according to claim 9, wherein
20 the vertical frame portion is configured to be foldable by swinging
around a laterally oriented swing pivot, and
the wiring is routed so as to pass through the inside of a movable portion of the vertical frame portion above the swing pivot.
25 11. The tractor according to claim 10, wherein the wiring is routed inside the vertical frame portion, and is routed from the inside of the vertical frame portion to the outside through a through hole provided above the swing pivot.
12. The tractor according to any one of claims 1 to 11, wherein a roof that 30 covers above the driver seat is attached to the ROPS.
13. The tractor according to claim 12, wherein
the ROPS has right and left vertical frame portions and a lateral frame portion that joins upper ends of the right and left vertical frame portions to each 35 other, and
when viewed from the front, the antenna unit is provided in a center

portion of the lateral frame portion, and the roof is fixed to the lateral frame portion at locations closer to the vertical frame portions than the location where the antenna unit is provided in the lateral frame portion.
5 14. A working vehicle comprising: a steering wheel;
a steering shaft that rotatably supports the steering wheel; a vehicle body capable of traveling by either manual steering by the steering wheel or automatic steering of the steering wheel based on a planned 10 travel line; and
a steering switching switch that is disposed in the vicinity of the steering shaft, wherein, using a base end portion provided on the steering shaft side as a pivot, the steering switching switch is capable of swinging between a first direction for switching between starting and ending the automatic steering, and 15 a second direction for setting a start point and an end point of a travel reference line that serves as a reference for the planned travel line.
15. The working vehicle according to claim 14, wherein
the steering switching switch is configured such that:
20 swinging in the first direction is swinging upward or downward, and
swinging in the second direction is swinging forward or rearward.
16. The working vehicle according to claim 15, wherein
the steering switching switch is configured such that:
25 starting of automatic steering is commanded by swinging downward
and ending of automatic steering is commanded by swinging upward, and
the start point of the travel reference line is set by swinging rearward and the end point of the travel reference line is set by swinging forward.
30 17. The working vehicle according to any one of claims 14 to 16, further
comprising:
a setting switch that is disposed in the vicinity of the steering shaft, and
at least switches to a setting mode for performing settings prior to starting the
automatic steering. 35
18. The working vehicle according to claim 17, further comprising:

a position detection device that detects a position of the vehicle body based on a signal from a positioning satellite; and
a correction switch that is disposed in the vicinity of the steering shaft, and corrects the position detected by the position detection device. 5
19. The working vehicle according to claim 17 or 18, further comprising:
a screen switching switch that is disposed in the vicinity of the steering shaft, and selectively switches a display of a display device between a first screen that displays a driving situation in the setting mode and a second screen 10 that explains a setting operation in the setting mode.
*****