To provide an inexpensive fuel flow rate regulating device 10 of a simple structure stably and surely regulating a flow rate.

This fuel flow rate regulating device includes a pressing member 2 having a through-hole 21 communicated with a nozzle hole of a burner, a receiving member 3 having an annular projection 31 projecting toward the pressing member 2, and a through-hole 32 formed inside of the annular projection 31 and communicated with a fuel tank 20, and a filter section 4 including a microporous film 43 at a fuel inflow face 41 side and a porous body 44 at an outflow face 42 side, wherein a fuel permeation amount of the filter section 4 is regulated by moving the pressing member 2 to approach the receiving member 3, and compressing a peripheral edge section of the filter section 4 along the fuel permeating direction by the annular projection 31.