A vehicle sunroof apparatus comprising: a movable panel that is adapted to open and close an opening formed on a roof of a vehicle; a guide rail that is disposed in each edge portion of the opening in a width direction of the vehicle and that extends in a longitudinal direction of the vehicle; a slide member that is linked to each edge portion of the movable panel in the width direction of the vehicle, that is disposed to be movable along the guide rail, and that is driven to move by an electrical driving source; a check mechanism that regulates a movement of the movable panel in the longitudinal direction when the slide member moves to a front part of the vehicle in a fully closed state of the movable panel, that shifts the fully closed state to a tilting-up state by causing a rear side section to ascend about a fulcrum of a front side section of the movable panel, and that releases the movement regulation of the movable panel by maintaining the tilting-up state when the slide member moves to a rear part of the vehicle after moving further to the front part of the vehicle in the tilting-up state; and a first member that is supported by any one of each edge portion of the movable panel in the width direction of the vehicle and the slide member; a support shaft that is fixed to the other one of each edge portion of the movable panel in the width direction of the vehicle and the slide member, and whose center line extends in the longitudinal direction of the vehicle; and a second member that is supported by the support shaft in a state where the second member is retained in an axial direction by a retaining portion formed on a distal end side of the support shaft which opposes the first member; characterized by a coil spring that is wound around the support shaft, and that biases the second member in the axial direction so as to come into contact with the retaining portion, wherein the second member is pivotally moved by a pressing operation between the first member and the second member when the slide member moves further to the front part of the vehicle in the tilting-up state, the second member is further pivotally moved when the slide member moves to the rear part of the vehicle thereafter, and in this manner, the first member and the second member are configured to engage with each other in order to move the movable panel integrally with the second member, and wherein an accommodation groove is formed in an outer peripheral portion of the support shaft. a movable panel that is adapted to open and close an opening formed on a roof of a vehicle; a guide rail that is disposed in each edge portion of the opening in a width direction of the vehicle and that extends in a longitudinal direction of the vehicle; a slide member that is linked to each edge portion of the movable panel in the width direction of the vehicle, that is disposed to be movable along the guide rail, and that is driven to move by an electrical driving source; a check mechanism that regulates a movement of the movable panel in the longitudinal direction when the slide member moves to a front part of the vehicle in a fully closed state of the movable panel, that shifts the fully closed state to a tilting-up state by causing a rear side section to ascend about a fulcrum of a front side section of the movable panel, and that releases the movement regulation of the movable panel by maintaining the tilting-up state when the slide member moves to a rear part of the vehicle after moving further to the front part of the vehicle in the tilting-up state; and a first member that is supported by any one of each edge portion of the movable panel in the width direction of the vehicle and the slide member; a support shaft that is fixed to the other one of each edge portion of the movable panel in the width direction of the vehicle and the slide member, and whose center line extends in the longitudinal direction of the vehicle; and a second member that is supported by the support shaft in a state where the second member is retained in an axial direction by a retaining portion formed on a distal end side of the support shaft which opposes the first member; characterized by a coil spring that is wound around the support shaft, and that biases the second member in the axial direction so as to come into contact with the retaining portion, wherein the second member is pivotally moved by a pressing operation between the first member and the second member when the slide member moves further to the front part of the vehicle in the tilting-up state, the second member is further pivotally moved when the slide member moves to the rear part of the vehicle thereafter, and in this manner, the first member and the second member are configured to engage with each other in order to move the movable panel integrally with the second member, and wherein an accommodation groove is formed in an outer peripheral portion of the support shaft.