1. A machine-room-less elevator comprising:
a hoisting machine that is disposed in an upper portion inside a hoistway, the hoisting machine comprising a driving sheave;
a suspending body that is wound around the driving sheave;
a car that is suspended by the suspending body on a first side of the driving sheave;
a counterweight that is suspended by the suspending body on a second side of the driving sheave;
first and second counterweight guide rails that are disposed inside the hoistway, the first and second counterweight guide rails guiding ascent and descent of the counterweight;
a counterweight suspending sheave that is disposed on the counterweight, the suspending body being wound around the counterweight suspending sheave; and
a counterweight speed governor that detects if a speed of the counterweight reaches an overspeed,
wherein:
the hoisting machine is disposed directly above the counterweight;
the first counterweight guide rail is disposed closer to a corner portion of the hoistway than the second counterweight guide rail;
the counterweight speed governor is disposed higher than a position of the counterweight if the car descends to a floor portion of the hoistway and the counterweight jumps upward; and
when viewed from directly above, at least a portion of the counterweight speed governor is disposed at an identical position to the first counterweight guide rail in a width direction of the counterweight, and is disposed at an identical position to a portion of the suspending body between the driving sheave and the counterweight suspending sheave in a direction that is perpendicular to the width direction of the counterweight.
2. The machine-room-less elevator according to Claim 1, wherein:
the counterweight speed governor is disposed lower than the hoisting machine; and
the hoisting machine overlaps partially with the counterweight speed governor when viewed from directly above.

3. The machine-room-less elevator according to Claim 1 or Claim 2,
wherein:
the counterweight suspending sheave is disposed on an upper portion of the counterweight; and
at least a portion of the counterweight speed governor is disposed so as to be equal in height to the counterweight suspending sheave if the counterweight jumps up.