To provide a working vehicle capable of carrying out quickly gas supply work, when a residual amount of fuel in a fuel tank 10 gets low to replenish fuel, and capable of preventing the fuel from overflowing uselessly to be lost.

A computing means C constituting a controller calculates a gas replenishing amount R of the fuel when filling fully the fuel in the fuel tank 10, based on a detection value of a residual amount detecting means A, when requested by a command means B, and notifies the replenishing amount R via a notifying means D such as a liquid crystal display 16 or a voice synthesizer 22.