To reduce the possibility of a control getting stuck on the inner wall of an insertion hole by preventing the operation of a lopsided load on the control during movement in a liquid flow control insertion hole, in which the liquid flow control is inserted, for a change in flow rate of a fuel liquid in a fuel liquid inlet passage.

The fuel liquid flow control valve 3 uses a moving body 8 having a female screw portion 83 for converting rotation driving force on a male screw portion 92 formed on a rotating shaft 91 of a stepping motor 9 into a linear driving force, whereby the rotation driving force of the motor 9 is converted into the linear driving force. The moving body 8 for pushing the liquid flow control 36 in one direction with the driving force and energizing means for energizing it in the other direction allow the control 36 inserted in the liquid flow control insertion hole 32a formed in a cylinder 32 to be reciprocated in the direction of insertion. A communication area between a liquid flow control hole 361 formed in the control 36 and a peripheral groove 321 formed in the cylinder is changed for the control of the flow rate of the fuel liquid.