An applicator (1) has syringe outer tubes (21) having mouths formed projected at the forward ends of the syringe outer tubes, gaskets (24) inserted in the syringe outer tubes, and pushers (26) for moving the gaskets along the longitudinal direction of the syringe outer tubes. To use the applicator (1), a first syringe (2) and a second syringe (3) that are filled with liquid are placed in spaces formed by the syringe outer tubes (21) and the gaskets (24). The applicator (1) has an applicator body (7) where the first syringe (2) and the second syringe (3) arranged side by side and fixed, a gas flow path connected to gas supply means (300) for supplying gas and through which the gas from the gas supply means (300) passes, a nozzle (4) for discharging liquid having passed the mouth of the first syringe (2) and liquid having passed the mouth of the second syringe (3), an operation section (8) for pressing both the pusher of the first syringe and the pusher of the second syringe toward the forward ends, and open/close means (9) provided at the operation section (8) and closing and opening the gas flow path. The open/close means (9) operates to open the gas flow path in operative association with pressing operation by the operation section (8).
