A shift control device of a hybrid vehicle comprising: an engine generating a driving force for running; a transmission forming a gear stage of a forward gear stage or a reverse gear stage and shifting a rotation input from the engine; an actuator performing a shifting operation to the forward gear stage and the reverse gear stage; and an electric motor provided in a power transmission path between the transmission and a drive wheel (6L, 6R) and generating a driving force for running, wherein in the transmission, a reverse idler gear sequentially moves from a neutral position to a reverse gear stage formation position, allowing the reverse idler gear to mesh with both a first gear and a second gear to complete the formation of the reverse gear stage, through a first position allowing the reverse idler gear to start to mesh with the first gear and a second position allowing the reverse idler gear to start to mesh with the second gear while meshing with the first gear, the shift control device being characterized in that: a control unit controlling the driving of the actuator is provided to form the reverse gear stage, the control unit performs a retry control of forming the reverse gear stage again when the formation of the reverse gear stage fails, and a first retry control is performed when the reverse idler gear is not able to mesh with the first gear and stops at a position between the neutral position and the first position and a second retry control, different from the first retry control, is performed when the reverse idler gear is not able to mesh with the second gear and stops at a position between the first position and the second position. an engine generating a driving force for running; a transmission forming a gear stage of a forward gear stage or a reverse gear stage and shifting a rotation input from the engine; an actuator performing a shifting operation to the forward gear stage and the reverse gear stage; and an electric motor provided in a power transmission path between the transmission and a drive wheel (6L, 6R) and generating a driving force for running, wherein in the transmission, a reverse idler gear sequentially moves from a neutral position to a reverse gear stage formation position, allowing the reverse idler gear to mesh with both a first gear and a second gear to complete the formation of the reverse gear stage, through a first position allowing the reverse idler gear to start to mesh with the first gear and a second position allowing the reverse idler gear to start to mesh with the second gear while meshing with the first gear, the shift control device being characterized in that: a control unit controlling the driving of the actuator is provided to form the reverse gear stage, the control unit performs a retry control of forming the reverse gear stage again when the formation of the reverse gear stage fails, and a first retry control is performed when the reverse idler gear is not able to mesh with the first gear and stops at a position between the neutral position and the first position and a control unit controlling the driving of the actuator is provided to form the reverse gear stage, the control unit performs a retry control of forming the reverse gear stage again when the formation of the reverse gear stage fails, and a first retry control is performed when the reverse idler gear is not able to mesh with the first gear and stops at a position between the neutral position and the first position and