A fuel maintenance guide system in hybrid vehicles in which a shift to the fuel maintenance mode giving priority to consuming fuel is executed automatically under a predetermined condition regardless of intention of a driver, the fuel maintenance guide system including: a residual fuel detecting unit detecting a residual amount of the fuel; a cancel condition determining unit determining a cancel condition for cancelling the shift to the fuel maintenance mode, based on the residual amount detected by the residual fuel detecting unit; and a displaying unit displaying the cancel condition determined by the cancel condition determining unit from a predetermined time period before the shift to the fuel maintenance mode.