Aspects of the present invention relate to providing a rotary connector device capable of suppressing the entry of foreign matter into a housing space through a portion corresponding to a locking unit in an opposing portion between a stationary side ring plate and an outer peripheral cylindrical portion. A rotator (10), which is configured by an annular top plate (11) and a cylindrically shaped inner peripheral portion (12), and a stator (20), which is configured by assembling an annular stator main body (21) and a cylindrically shaped sub stator (22), are assembled to be relatively rotatable in both a clockwise direction and a counterclockwise direction. An SRC (1) that houses a flat cable (F) being wound inside of a housing space (S) formed therein is provided with a stator locking portion (23) that enables a frame-shaped locking portion (231) that extends from the stator main body (21) to lock with a protruding locking portion (232) that is formed on the sub stator (22); and a recess-protrusion fitting portion (25) that suppresses the entry of foreign matter into the housing space (S). The recess-protrusion fitting portion (25) is disposed on an opposing portion (24) that corresponds to the stator locking portion (23).