A saddlebag attachment structure for a saddle riding type vehicle, comprising: a vehicle body; a bag supporting portion provided at a vehicle body rear portion; an occupant step attached to a side surface of the vehicle body rear portion with attachment means (28, 28A); a saddlebag having saddlebag side latch means (16, 18) to be latched into the bag supporting portion; and a latch member whose front side is attached to the vehicle body rear portion, whose rear side can be engaged with the saddlebag and which is a unit separate from the occupant step, wherein the latch member is attached to a vehicle body attachment portion where the occupant step is to be attached, by using the attachment means (28, 28A) to which the occupant step is attached, and the latch member is provided to extend from the vehicle body attachment portion to the rear side; characterized in that the attachment means (28, 28A) includes screw members (28, 28A); the occupant step and the latch member respectively include a step side insertion hole and a latch member side insertion hole through both of which a screw member (28, 28A) is inserted, and the occupant step and the latch member are attached to the vehicle body attachment portion by inserting the screw member (28, 28A) through the step side insertion hole and the latch member side insertion hole; and the latch member includes a latch member side attachment portion attached to the vehicle body attachment portion, the occupant step includes a step side attachment portion attached to the vehicle body attachment portion, the latch member side attachment portion has an upper surface portion and inner and outer side surface portions (32B, 32C), and the latch member side attachment portion is fitted onto outer sides of the step side attachment portion; and the screw member is inserted through a latch member side insertion hole in the outer side surface portion, the step side insertion hole of the step side attachment portion of the occupant step, and a latch member side insertion hole in the inner side surface portion and is then screwed into a nut. a vehicle body; a bag supporting portion provided at a vehicle body rear portion; an occupant step attached to a side surface of the vehicle body rear portion with attachment means (28, 28A); a saddlebag having saddlebag side latch means (16, 18) to be latched into the bag supporting portion; and a latch member whose front side is attached to the vehicle body rear portion, whose rear side can be engaged with the saddlebag and which is a unit separate from the occupant step, wherein the latch member is attached to a vehicle body attachment portion where the occupant step is to be attached, by using the attachment means (28, 28A) to which the occupant step is attached, and the latch member is provided to extend from the vehicle body attachment portion to the rear side; characterized in that the attachment means (28, 28A) includes screw members (28, 28A); the occupant step and the latch member respectively include a step side insertion hole and a latch member side insertion hole through both of which a screw member (28, 28A) is inserted, and the occupant step and the latch member are attached to the vehicle body attachment portion by inserting the screw member (28, 28A) through the step side insertion hole and the latch member side insertion hole; and the latch member includes a latch member side attachment portion attached to the vehicle body attachment portion, the occupant step includes a step side attachment portion attached to the vehicle body attachment portion, the latch member side attachment portion has an upper surface portion and inner and outer side surface portions (32B, 32C), and the latch member side attachment portion is fitted onto outer sides of the step side attachment portion; and the screw member is inserted through a latch member side insertion hole in the outer side surface portion, the step side insertion hole of the step side attachment portion of the occupant step, and a latch member side insertion hole in the inner side surface portion and is then screwed into a nut.