To apply coating liquid only to one face of an easily permeable porous base material 1 by transferring and applying the coating liquid 3 to the porous base material 1 in a semidry state.

A method of applying coating liquid to a porous base material includes: a first step of applying the coating liquid 3 to one face of released paper 2 that is peeling processed paper; a second step of making the coating liquid 3 semidry by using a heater etc.; and a third step of peeling the released paper 2 for transfer and application while the porous base material 1 is brought into contact with the surface of the semidry coating liquid 3 after the second step. The porous base material uses the method.