[Claim 1]
An indoor unit of an air-conditioning apparatus, comprising:
a front panel arranged on a front side of an indoor unit body and having a flat shaped front surface; and
a design cover mounted on a front side of the front panel, the front panel including:
a recess formed in a center of the front panel in an up-and-down direction in front view, and extending from an inner side of a left end portion of the front panel to an inner side of a right end portion of the front panel; an air inlet formed below the recess;
a left-hand recess side portion positioned on a left side of the recess of the front panel in front view; and
a right-hand recess side portion positioned on a right side of the recess of the front panel in front view,
the design cover including:
an upper design cover configured to cover a region extending from an upper end portion of the recess to an upper end portion of the front panel and extending from a left end portion to a right end portion of the front panel in front view; and
a lower design cover configured to cover a region extending from a lower end portion of the recess to a lower end portion of the front panel and extending from the left end portion to the right end portion of the front panel in front view,
the left-hand recess side portion being flat and flush with flat surfaces above and below the left-hand recess side portion,
the right-hand recess side portion being flat and flush with flat surfaces above and below the right-hand recess side portion. [Claim 2]
The indoor unit of an air-conditioning apparatus of claim 1, wherein the design cover protrudes from the right and left end portions of the front panel in front view. [Claim 3]

The indoor unit of an air-conditioning apparatus of claim 1 or 2, wherein the upper design cover and the lower design cover are formed to be identical to each other. [Claim 4]
The indoor unit of an air-conditioning apparatus of any one of claims 1 to 3, wherein an entire front surface of the front panel and an entire front surface of the design cover are flat. [Claim 5]
The indoor unit of an air-conditioning apparatus of any one of claims 1 to 4, wherein the design cover comprises a transparent member. [Claim 6]
The indoor unit of an air-conditioning apparatus of claim 5, wherein the design cover is provided with a coating from a back side of the design cover.