A vehicle sun roof apparatus comprising: a movable panel configured to open and close an opening section formed in a roof portion of a vehicle; a guide rail provided at an edge portion of the opening section in the vehicle width direction and extending in the fore-and-aft direction of the vehicle; a sliding member linked to an edge portion of the movable panel in the vehicle width direction, provided along the guide rail so as to be movable in the fore-and-aft direction of the vehicle, and driven to be moved by an electric drive source; a check mechanism configured to transfer the movable panel to a tilt-up state by locking the movement of the movable panel in the fore-and-aft direction of the vehicle and moving a rear portion upward about a supporting point at a front portion of the movable panel when the sliding member moves forward of the vehicle in a fully-closed state of the movable panel, characterized in that the check mechanism release a movement lock of the movable panel while maintaining the tilt-up state when the sliding member moves further forward of the vehicle and then moves rearward of the vehicle in the tilt-up state; and in that the sun roof apparatus further comprises an engagement and disengagement switching mechanism provided with a first member supported by either the sliding member or the edge portion of the movable panel in the vehicle width direction, and a second member supported by the other one of the sliding member and the edge portion of the movable panel in the vehicle width direction, and configured to engage the first member and the second member to each other by pressing either one of the first member and the second member by the other one of the first member and the second member so that the movable panel moves integrally when the sliding member moves rearward of the vehicle thereafter. a movable panel configured to open and close an opening section formed in a roof portion of a vehicle; a guide rail provided at an edge portion of the opening section in the vehicle width direction and extending in the fore-and-aft direction of the vehicle; a sliding member linked to an edge portion of the movable panel in the vehicle width direction, provided along the guide rail so as to be movable in the fore-and-aft direction of the vehicle, and driven to be moved by an electric drive source; a check mechanism configured to transfer the movable panel to a tilt-up state by locking the movement of the movable panel in the fore-and-aft direction of the vehicle and moving a rear portion upward about a supporting point at a front portion of the movable panel when the sliding member moves forward of the vehicle in a fully-closed state of the movable panel, characterized in that the check mechanism release a movement lock of the movable panel while maintaining the tilt-up state when the sliding member moves further forward of the vehicle and then moves rearward of the vehicle in the tilt-up state; and in that the sun roof apparatus further comprises an engagement and disengagement switching mechanism provided with a first member supported by either the sliding member or the edge portion of the movable panel in the vehicle width direction, and a second member supported by the other one of the sliding member and the edge portion of the movable panel in the vehicle width direction, and configured to engage the first member and the second member to each other by pressing either one of the first member and the second member by the other one of the first member and the second member so that the movable panel moves integrally when the sliding member moves rearward of the vehicle thereafter.