A sunroof structure for an automobile, comprising: side frames which are provided respectively in left and right side portions of a vehicle body roof and which extend along a vehicle front-rear direction; a roof panel which is provided between the left and right side frames and which has a sunroof opening; a sunroof which is provided in the sunroof opening and has two or more glass panels (9,10) arranged next to each other in the vehicle front-rear direction and in which at least a foremost glass panel out of the glass panels (9,10) is configured to be openable and closable; left and right sunroof side rails which are provided below a peripheral portion of the sunroof opening to extend along the vehicle front-rear direction and which have a drain groove and a drain portion configured to discharge water accumulated in the drain groove to an outside of a vehicle; characterized in that it further comprises: a reinforcement member which is disposed along a vehicle width direction between the sunroof side rails and a rear glass panel and which connects the left and right side frames to each other; and a drain member (22, 23) which is disposed between the peripheral portion of the sunroof opening and the reinforcement member and which receives water falling from the peripheral portion of the sunroof opening toward an inside of a vehicle cabin and causes the water to flow to the drain groove of the sunroof side rail. side frames which are provided respectively in left and right side portions of a vehicle body roof and which extend along a vehicle front-rear direction; a roof panel which is provided between the left and right side frames and which has a sunroof opening; a sunroof which is provided in the sunroof opening and has two or more glass panels (9,10) arranged next to each other in the vehicle front-rear direction and in which at least a foremost glass panel out of the glass panels (9,10) is configured to be openable and closable; left and right sunroof side rails which are provided below a peripheral portion of the sunroof opening to extend along the vehicle front-rear direction and which have a drain groove and a drain portion configured to discharge water accumulated in the drain groove to an outside of a vehicle; characterized in that it further comprises: a reinforcement member which is disposed along a vehicle width direction between the sunroof side rails and a rear glass panel and which connects the left and right side frames to each other; and a drain member (22, 23) which is disposed between the peripheral portion of the sunroof opening and the reinforcement member and which receives water falling from the peripheral portion of the sunroof opening toward an inside of a vehicle cabin and causes the water to flow to the drain groove of the sunroof side rail. a reinforcement member which is disposed along a vehicle width direction between the sunroof side rails and a rear glass panel and which connects the left and right side frames to each other; and a drain member (22, 23) which is disposed between the peripheral portion of the sunroof opening and the reinforcement member and which receives water falling from the peripheral portion of the sunroof opening toward an inside of a vehicle cabin and causes the water to flow to the drain groove of the sunroof side rail.