An output performance recovering device for a fuel cell includes: a diagnosis unit configured to determine whether it is necessary to recover a catalyst of a fuel cell mounted as a power source for traveling in a vehicle from short-term performance deterioration; a recovery unit configured to control a voltage of the fuel cell and to perform recovery processing for recovering the catalyst from the short-term performance deterioration; a calculation unit configured to calculate a parameter correlated with a predicted output value of the fuel cell which has been predicted to be output on a scheduled traveling route of the vehicle based on a gradient of the scheduled traveling route of the vehicle and a predicted vehicle speed of the vehicle on the scheduled traveling route; and a determination unit configured to determine whether the parameter indicates the predicted output value is greater than a first threshold value.