To provide a bar coating device capable of thin film-coating a web with a coating liquid so as to generate no fluid streak in bar coating and to provide its method.

In the bar coating device 10 coating the continuously moving web 12 with the coating liquid by using a rotating cylindrical bar 20 supported with a bar receiving member 22, the material of the bar supporting surface of the bar receiving member 22 supporting the bar 20 exhibits the expansion of the surface of 1 m or more and 50 m or less by immersion of the coating liquid and is constituted of a material which has a hardness lower than the material of the bar.