To attain quantitative discharge by specifying with high accuracy the amount of a fluid supplied to a groove part, to a fixed amount corresponding to the shape of the groove part.

A flow path specifying member 20 including a cylindrical member 4 and a member 2 of round column shape is switched into a first connection state in which a first through-hole group 4α is connected to a groove part 2b, a second connection state in which a second through-hole group 4β is connected to the groove part 2b, and a blocked state in which the groove part 2b is blocked with an inner peripheral surface 4e of the cylindrical member 4 between the first and second connection states by rotating the member 2 of round column shape in the neighborhood of a center axis 10. The fluid filled in the groove part 2b in the first state is discharged from the second through-hole group in the second state, thus discharging the fluid in the amount corresponding to the groove part 2b.