A gear shifting control device for a transmission connected to an engine comprising: a pedal operation detection unit which detects a gear shifting operation of a shift pedal; and a control unit which performs output suppression control for suppressing output of the engine in accordance with the gear shifting operation detected by the pedal operation detection unit, characterised in that the control unit includes: a change rate calculation unit which calculates a time change rate (DFSA) of a pedal load detection value detected by the pedal operation detection unit; a load prediction unit which obtains a pedal load prediction value after a specified time elapses from the time change rate (DFSA); a pedal load determination unit which determines whether or not the pedal load detection value reaches a first threshold value (FSCC); a predicted value determination unit which determines whether or not the pedal load prediction value exceeds a second threshold value (FSCTC) when the pedal load detection value reaches the first threshold value (FSCC); and an output suppression control unit which performs the output suppression control when it is determined that the pedal load prediction value exceeds the second threshold value (FSCTC). a pedal operation detection unit which detects a gear shifting operation of a shift pedal; and a control unit which performs output suppression control for suppressing output of the engine in accordance with the gear shifting operation detected by the pedal operation detection unit, characterised in that the control unit includes: a change rate calculation unit which calculates a time change rate (DFSA) of a pedal load detection value detected by the pedal operation detection unit; a load prediction unit which obtains a pedal load prediction value after a specified time elapses from the time change rate (DFSA); a pedal load determination unit which determines whether or not the pedal load detection value reaches a first threshold value (FSCC); a predicted value determination unit which determines whether or not the pedal load prediction value exceeds a second threshold value (FSCTC) when the pedal load detection value reaches the first threshold value (FSCC); and an output suppression control unit which performs the output suppression control when it is determined that the pedal load prediction value exceeds the second threshold value (FSCTC). a change rate calculation unit which calculates a time change rate (DFSA) of a pedal load detection value detected by the pedal operation detection unit; a load prediction unit which obtains a pedal load prediction value after a specified time elapses from the time change rate (DFSA); a pedal load determination unit which determines whether or not the pedal load detection value reaches a first threshold value (FSCC); a predicted value determination unit which determines whether or not the pedal load prediction value exceeds a second threshold value (FSCTC) when the pedal load detection value reaches the first threshold value (FSCC); and an output suppression control unit which performs the output suppression control when it is determined that the pedal load prediction value exceeds the second threshold value (FSCTC).