Abstract: A pump capable of releasing excessive air is shown to include a hollow base, a cylinder installed on and communicated with the hollow base, a piston movably received in the cylinder, a piston tube including a lower end connected with the piston and an upper end located beyond the cylinder, a tube including a lower end communicated with the hollow base and an upper end inserted into the piston tube through a channel defined in the piston, a release valve mounted on the upper end of the piston tube and a handle mounted on the upper end of the piston tube. The valve is installed on the handle so that it can be touched conveniently and operated easily by a user who is using the pump.