A sunroof device includes: a guide rail provided on each edge portion of an opening formed in a roof of a vehicle in a width direction; a sliding member supported on the guide rail so as to be slidable in a longitudinal direction of the vehicle; and a support member provided with a first elastic member and having a front end portion supported on the guide rail so as to be rotatable and slidable in the longitudinal direction of the vehicle, the support member supporting a movable panel that opens and closes the opening, in which the sliding member includes a bottom wall located above the guide rail, a vertical wall provided upright on the bottom wall, and an engaging portion provided on the vertical wall, the support member includes a guide portion engaged with the engaging portion, and the guide portion including first and second guide portions.