To provide a fluid supply valve assembly capable of capturing particles in a fluid before a nozzle of a supply valve assembly enters,

This fluid supply valve assembly is provided with a valve adapter, a valve seat part formed in the valve adapter, a valve member disposed movably between a first position where a valve member is seated at a valve seat part to prevent a fluid from being supplied through the valve assembly and a second position where the valve member is not seated at the valve seat part so that the fluid can be supplied through the valve assembly, a supply nozzle fitted to the valve adapter to supply the fluid from the valve assembly, and a nozzle filter fitted to the valve adapter in a position jus on the upstream side of the supply nozzle to thereby filter the particle flakes to prevent clogging of the supply nozzle when the particle flakes exist in the fluid.