An applicator is inserted into a living body and applies mixed solution to a region in the living body. The applicator includes a nozzle including an elongated nozzle main body to which gas and a plurality of kinds of liquids are supplied and a nozzle head at a distal end of the nozzle main body and configured to jet A mixed solution of the gas and the liquids supplied to the nozzle main body, and a sheath in which the nozzle main body is fitted for relative movement along a longitudinal axial direction of the nozzle main body. At least two crushed portions are provided contiguously to each other at a proximal end portion of the nozzle main body at the opposite side to the nozzle head such that deformation directions thereof with respect to an axial line of the nozzle main body are different from each other.
