A fuel evaporator for an internal combustion engine comprises a casing composed of a heating plate member, a supporting member projecting from the outer periphery of the heating plate member underwards and a heat resistant and electric insulating covering member which covers the supporting member, a heating element can be fixed to the heating plate member within the casing and an electrically connecting means which connects the heating element and an electric power source. The fuel evaporator further comprises an elastic cushion member which is disposed in the under surface of the heating element and a spring means which supports and presses the heating element against the heating plate member of the casing through the cushion member. Due to the elasticity of the cushion member, the heating element is uniformly pressed by the spring means without being broken.