The invention relates to a fuel metering valve for an internal combustion engine. The fuel metering valve includes a housing (1), a gas chamber (7) formed in the housing (1), a fuel filled chamber (33); a nozzle needle (10) can be longitudinally and movably arranged in the housing; the nozzle needle acts with a seal seat (13) in the housing and is guided in a hole (6) of the housing (1); the gas chamber surrounds the nozzle needle (10) and can communicate with at least one injection hole (9) by opening the seal seat (13); the fuel filled chamber (33) surrounds the nozzle needle (10), departs from the gas chamber (7), and can be filled with fuel; and a leakage gap (35) is formed between a wall of the hole (6) and the nozzle needle (10) and leads to the gas chamber (7). Through operation of the fuel metering valve, liquid fuel amount for improving gas ignition capacity can be continuously sent to the gas chamber (7) through the leakage gap (35).