Abstract: Disclosed is a capsule for use in fixing an anchor bolt, which comprises (1) a primary casing having a sealed construction or a fluid-tight construction, (2) a curable resin composition, contained in the primary casing, comprising an ester of an epoxy resin with (meth)acrylic acid, and a reactive monomer, wherein each of the ester and the reactive monomer has a specific gravity equal to or greater than the specific gravity of sea water, (3) a curing agent for the curable resin composition, disposed in association with the primary casing and in isolation from the curable resin composition, wherein the curing agent comprises an organic peroxide, and (4) a surfactant contained in at least one of the curable resin composition and the curing agent, or disposed in association with the primary casing and separately from the curable resin composition and the curing agent.