Porous body, and method for producing porous body

The present invention provides a porous body, the swelling of which under acidic conditions is suppressed, and a method for producing the porous body. The first porous body of the present invention is formed of a copolymer of an epoxy compound and a curing agent, wherein the porous body is a porous body containing no primary to tertiary amino groups and has an interconnected pore structure in which holes provided inside the porous body communicate with each other. The second porous body of the present invention is formed of a copolymer of an epoxy compound and a curing agent, wherein the porous body is a porous body containing no nitrogen atom to be quaternized by acid treatment, and has an interconnected pore structure in which holes provided inside the porous body communicate with each other.