A rotary connector device comprising: a rotation body and a fixed body that engage with each other in a relatively rotatable manner and form, in an interior thereof, a housing space having a cylindrical shape; and a flat cable housed in the housing space in a wound manner, wherein the rotation body comprises: a rotating-side ring plate having an annular shape and an inner-circumferential cylindrical portion having a cylindrical shape and forming an inner peripheral surface of the housing space, the fixed body comprises: a stationary-side ring plate having an annular shape and an outer-circumferential cylindrical portion forming an outer peripheral surface of the housing space, the flat cable has a first end coupled to a stationary-side connector that is electrically connected to an electric device item disposed at a side of the fixed body, the fixed body comprises an insertion portion that allows a first end side of the flat cable to be inserted from the housing space toward an outer side of the fixed body along a rotation axis direction of the rotation body that relatively rotates, the stationary-side connector is disposed on a main surface of the stationary-side ring plate on an outer side thereof; the rotary connector being characterized in that the main surface of the stationary-side ring plate on the outer side thereof comprises a placement part used to place the stationary-side connector, a wall-shaped partition portion is arranged to separate the insertion portion and the placement part, and in that the flat cable extends from the housing space through the insertion portion and is looped back over the partition portion to the stationary-side connector placed at the placement part. a rotation body and a fixed body that engage with each other in a relatively rotatable manner and form, in an interior thereof, a housing space having a cylindrical shape; and a flat cable housed in the housing space in a wound manner, wherein the rotation body comprises: a rotating-side ring plate having an annular shape and an inner-circumferential cylindrical portion having a cylindrical shape and forming an inner peripheral surface of the housing space, the fixed body comprises: a stationary-side ring plate having an annular shape and an outer-circumferential cylindrical portion forming an outer peripheral surface of the housing space, the flat cable has a first end coupled to a stationary-side connector that is electrically connected to an electric device item disposed at a side of the fixed body, the fixed body comprises an insertion portion that allows a first end side of the flat cable to be inserted from the housing space toward an outer side of the fixed body along a rotation axis direction of the rotation body that relatively rotates, the stationary-side connector is disposed on a main surface of the stationary-side ring plate on an outer side thereof; the rotary connector being characterized in that the main surface of the stationary-side ring plate on the outer side thereof comprises a placement part used to place the stationary-side connector, a wall-shaped partition portion is arranged to separate the insertion portion and the placement part, and in that the flat cable extends from the housing space through the insertion portion and is looped back over the partition portion to the stationary-side connector placed at the placement part.