PROBLEM TO BE SOLVED: To provide a liquefied fuel gas vaporizer which enables a component having a structure other than explosion-proof structure to be used as a structural part in a housing.SOLUTION: A liquefied fuel gas vaporizer 100 includes: an inflow pipe 4 which introduces a gas fuel in a liquid phase; a heat transfer pipe 2 which heats the liquid phase gas fuel introduced through the inflow pipe 4 by a heat medium liquid heated by a burner 9 to vaporise the gas fuel; an outflow pipe 5 which exhausts the fuel gas vaporised in the heat transfer pipe 2; and a control board 17 for controlling the burner 9. The liquefied fuel gas vaporizer 100 includes: a housing 23 which houses the inflow pipe 4, the heat transfer pipe 2, the outflow pipe 5, and the control board 17; and a fan 24 which is provided in the housing 23 and exhausts the gas in the housing 23 to the exterior of the housing 23.
