To provide a lining concrete curing device which is for use when a curing agent is applied to lining concrete of a tunnel, and can uniformly apply the curing agent irrespective of the type of the curing agent.

The curing device 10 is movable according to movement of a centering, and can apply the curing agent to a surface 1a of the lining concrete 1 of the tunnel. The curing device is formed of an application device for applying the curing agent, and an adjusting device consisting of an elastic member 11 and an elastic support member 12 for elastically supporting the elastic member 11, for leveling application quantity and application distribution of the applied curing agent.