A coating material is uniformly applied on an inner wall surface of a container while preventing leakage of the coating material and an increase in an installation space. An application apparatus (10) that applies a coating material (L) on an inner wall surface of a container (C) includes: a spray gun (20) having a spray nozzle (22); an outgoing pipe (30) and a return pipe (33); a supply controller (50); a rotary driver (60); and a mover (70), wherein the outgoing pipe (30) and the return pipe (33) are each provided with a resilient-shape part (32, 35) capable of extending and contracting resiliently.