A gear shift control device of a saddle ride type vehicle, comprising: an operation pedal (107, 150, 159, 183, 202, 224) which is operated to turn by the foot of a rider to perform a gear shift and includes an arm portion with a pedal portion at one end; a movable part (114A, 114B, 114C, 114D) which includes a movable member (113, 170, 186, 206) interlocking with and connected to the arm portion and which also includes at least one of a click mechanism (136, 172, 190, 210) configured to give click feeling to an operation of the pedal portion, a stopper mechanism (140, 178, 196, 216) configured to restrict a turning operation range of the arm portion, and a return mechanism (143, 180, 199, 219) configured to apply a spring force in a return direction to the arm portion; and a detector which detects a gear shift operation performed by using the pedal portion, the gear shift control device configured to make a transmission perform a gear shift on the basis of a detection result of the detector, wherein the pedal portion and the movable part (114A, 114B, 114C, 114D) are disposed in such a way that a region in which the movable part (114A, 114B, 114C, 114D) moves is laterally offset from a region (AP1, AP2) in which the pedal portion moves; characterized in that a foot-movement restriction portion configured to restrict the foot of the rider placed on the operation pedal (107, 150, 159, 183, 202, 224) from moving laterally inward is fixedly disposed laterally inside the operation pedal (107, 150, 159, 183, 202, 224) and the lateral region in which the movable part (114A, 114B, 114C, 114D) moves is disposed laterally inside the foot-movement restriction portion. an operation pedal (107, 150, 159, 183, 202, 224) which is operated to turn by the foot of a rider to perform a gear shift and includes an arm portion with a pedal portion at one end; a movable part (114A, 114B, 114C, 114D) which includes a movable member (113, 170, 186, 206) interlocking with and connected to the arm portion and which also includes at least one of a click mechanism (136, 172, 190, 210) configured to give click feeling to an operation of the pedal portion, a stopper mechanism (140, 178, 196, 216) configured to restrict a turning operation range of the arm portion, and a return mechanism (143, 180, 199, 219) configured to apply a spring force in a return direction to the arm portion; and a detector which detects a gear shift operation performed by using the pedal portion, the gear shift control device configured to make a transmission perform a gear shift on the basis of a detection result of the detector, wherein the pedal portion and the movable part (114A, 114B, 114C, 114D) are disposed in such a way that a region in which the movable part (114A, 114B, 114C, 114D) moves is laterally offset from a region (AP1, AP2) in which the pedal portion moves; characterized in that a foot-movement restriction portion configured to restrict the foot of the rider placed on the operation pedal (107, 150, 159, 183, 202, 224) from moving laterally inward is fixedly disposed laterally inside the operation pedal (107, 150, 159, 183, 202, 224) and the lateral region in which the movable part (114A, 114B, 114C, 114D) moves is disposed laterally inside the foot-movement restriction portion.