An application apparatus that applies a coating material on an inner wall surface of a container, comprising: a spray gun having a spray nozzle and including a coating material ejection passage formed therein; an outgoing pipe and a return pipe attached to said spray gun and forming a coating material circulatory path connecting to said coating material ejection passage; a supply control unit controlling supply of the coating material from said coating material circulatory path to said coating material ejection passage; a rotary drive unit rotating said spray gun around an axis extending along a longitudinal direction of the gun; and a moving unit moving said spray gun along the longitudinal direction of the gun, wherein said spray gun includes, formed therein, said coating material ejection passage connecting to said spray nozzle, and a coating material passage connecting to said coating material ejection passage; said outgoing pipe and said return pipe each have one end attached to an outer circumferential part of said spray gun that is rotatable so as to connect directly with said coating material passage, and form said coating material circulatory path together with said coating material passage; said supply control unit includes an open/close valve provided between said coating material passage and said coating material ejection passage and is configured to supply the coating material from said coating material passage to said coating material ejection passage by opening and closing said valve; said outgoing pipe and said return pipe are each provided with a coil-like resilient-shape part (32, 35) capable of extending and contracting resiliently; and said coil-like resilient-shape parts (32,35) of said outgoing pipe and said return pipe are disposed outside said spray gun so as not to surround said spray gun that is rotatable. a spray gun having a spray nozzle and including a coating material ejection passage formed therein; an outgoing pipe and a return pipe attached to said spray gun and forming a coating material circulatory path connecting to said coating material ejection passage; a supply control unit controlling supply of the coating material from said coating material circulatory path to said coating material ejection passage; a rotary drive unit rotating said spray gun around an axis extending along a longitudinal direction of the gun; and a moving unit moving said spray gun along the longitudinal direction of the gun, wherein said spray gun includes, formed therein, said coating material ejection passage connecting to said spray nozzle, and a coating material passage connecting to said coating material ejection passage; said outgoing pipe and said return pipe each have one end attached to an outer circumferential part of said spray gun that is rotatable so as to connect directly with said coating material passage, and form said coating material circulatory path together with said coating material passage; said supply control unit includes an open/close valve provided between said coating material passage and said coating material ejection passage and is configured to supply the coating material from said coating material passage to said coating material ejection passage by opening and closing said valve; said outgoing pipe and said return pipe are each provided with a coil-like resilient-shape part (32, 35) capable of extending and contracting resiliently; and said coil-like resilient-shape parts (32,35) of said outgoing pipe and said return pipe are disposed outside said spray gun so as not to surround said spray gun that is rotatable.