A rotary connector device comprising: a rotator; a stator that is a member configured to hold the rotator rotatably around an axis line and form an annular space around the axis line between the rotator and the stator; a rotator side connector configured to enable an electrical connection with the outside in the rotator; a stator side connector configured to enable an electrical connection with the outside in the stator; and a flexible cable that is a flexible flat cable configured to be housed within the annular space and electrically connected to the rotator side connector and the stator side connector, wherein the rotator includes a rotator main body that is an annular member surrounding the axis line and a connector housing section (33, 233, 333) that is a space opened to the annular space and the outside of the annular space and forms a connector housing space configured to house the rotator side connector, and the connector housing section (33, 233, 333) is configured to allow the rotator side connector to be held, and includes a connector holding section (311, 321, 331) protruding from the rotator main body to the outside of the annular space, and a cover member (312, 322, 332) that is a member configured to at least partially cover the connector holding section (311, 321, 331) on a peripheral surface along a direction in which the connector holding section (311, 321, 331) protrudes, characterized in that a concave portion opened to an outer circumferential side is formed in the connector holding section (311, 321, 331), and the rotator side connector is held in the concave portion, the cover member (312, 322, 332) is a member configured to cover the concave portion from the outer circumferential side, and the connector housing space is formed by the cover member (312, 322, 332) covering the connector holding section (311, 321, 331). a rotator; a stator that is a member configured to hold the rotator rotatably around an axis line and form an annular space around the axis line between the rotator and the stator; a rotator side connector configured to enable an electrical connection with the outside in the rotator; a stator side connector configured to enable an electrical connection with the outside in the stator; and a flexible cable that is a flexible flat cable configured to be housed within the annular space and electrically connected to the rotator side connector and the stator side connector, wherein the rotator includes a rotator main body that is an annular member surrounding the axis line and a connector housing section (33, 233, 333) that is a space opened to the annular space and the outside of the annular space and forms a connector housing space configured to house the rotator side connector, and the connector housing section (33, 233, 333) is configured to allow the rotator side connector to be held, and includes a connector holding section (311, 321, 331) protruding from the rotator main body to the outside of the annular space, and a cover member (312, 322, 332) that is a member configured to at least partially cover the connector holding section (311, 321, 331) on a peripheral surface along a direction in which the connector holding section (311, 321, 331) protrudes, characterized in that a concave portion opened to an outer circumferential side is formed in the connector holding section (311, 321, 331), and the rotator side connector is held in the concave portion, the cover member (312, 322, 332) is a member configured to cover the concave portion from the outer circumferential side, and the connector housing space is formed by the cover member (312, 322, 332) covering the connector holding section (311, 321, 331).