A foam dispenser, comprising: a cylinder member that includes: an upper end portion adapted to be secured to a placing cap fitted over an outer circumference of a neck of a container body so that the cylinder member is suspended in the container body; a large-diameter air cylinder; and a small-diameter liquid cylinder provided concentrically with and below the large-diameter air cylinder; and an actuator that includes: a stem; a liquid piston protruding from a lower portion of an outer circumference of the stem and adapted to slide in the liquid cylinder; an air piston linked to the outer circumference of the stem and adapted to slide in the air cylinder; and a dispenser head fitted over an upper end of the stem, the actuator being urged upward and adapted to be displaceable upward and downward such that the upward and the downward displacement of the actuator causes a liquid within the liquid cylinder and air within the air cylinder to be mixed and foamed to be dispensed as a foam from an outlet of the dispenser head, wherein the dispenser head comprises two members in the form of a first member and a second member, characterized in that the first member includes: a top plate; a longitudinal tube suspending from a middle portion of a back surface of the top plate and including a lower portion fitted around an outer circumference of an upper portion of the stem; and a nozzle provided on the longitudinal tube to protrude forward, the nozzle including an open base end whose top portion in part constitutes the top plate, and the second member includes: a ring shaped top plate portion; a vertical wall portion suspending from an outer circumference of the ring shaped top plate portion; a circumferential wall portion suspending from an inner circumference of the ring shaped top plate portion; a first fitting recess provided in a front portion of the ring-shaped top plate portion and the vertical wall portion; and a second fitting recess provided along the inner circumference of the ring-shaped top plate portion that is in contiguity with the first fitting recess, the first and the second member being integrated by fitting the base end of the nozzle to the first fitting recess and fitting an outer circumference of the top plate to the second fitting recess. a cylinder member that includes: an upper end portion adapted to be secured to a placing cap fitted over an outer circumference of a neck of a container body so that the cylinder member is suspended in the container body; a large-diameter air cylinder; and a small-diameter liquid cylinder provided concentrically with and below the large-diameter air cylinder; and an actuator that includes: a stem; a liquid piston protruding from a lower portion of an outer circumference of the stem and adapted to slide in the liquid cylinder; an air piston linked to the outer circumference of the stem and adapted to slide in the air cylinder; and a dispenser head fitted over an upper end of the stem, the actuator being urged upward and adapted to be displaceable upward and downward such that the upward and the downward displacement of the actuator causes a liquid within the liquid cylinder and air within the air cylinder to be mixed and foamed to be dispensed as a foam from an outlet of the dispenser head, wherein the dispenser head comprises two members in the form of a first member and a second member, characterized in that the first member includes: a top plate; a longitudinal tube suspending from a middle portion of a back surface of the top plate and including a lower portion fitted around an outer circumference of an upper portion of the stem; and a nozzle provided on the longitudinal tube to protrude forward, the nozzle including an open base end whose top portion in part constitutes the top plate, and the second member includes: a ring shaped top plate portion; a vertical wall portion suspending from an outer circumference of the ring shaped top plate portion; a circumferential wall portion suspending from an inner circumference of the ring shaped top plate portion; a first fitting recess provided in a front portion of the ring-shaped top plate portion and the vertical wall portion; and a second fitting recess provided along the inner circumference of the ring-shaped top plate portion that is in contiguity with the first fitting recess, the first and the second member being integrated by fitting the base end of the nozzle to the first fitting recess and fitting an outer circumference of the top plate to the second fitting recess.