A roof apparatus includes a movable panel, a guide rail, a first rail portion and a second rail portion which are provided at the guide rail in a manner that at least a part of the first rail portion and at least a part of the second rail portion are overlapped with each other in the vehicle width direction, a front side guide member including a guide groove, a front side link member including a support protruding portion which is movable along the second rail portion or along the guide groove which is inclined in a vehicle upward direction towards a vehicle rear direction, and a transmission member which is movable along the first rail portion, and is linked to a rear side link member connected to the movable panel and is linked to the front side link member.