An antifouling coating composition comprising a hydrolysable copolymer (A) and an antifouling agent (B), wherein the hydrolysable copolymer (A) is at least one hydrolysable copolymer selected from the group consisting of: (a1) a copolymer containing metal salt bond which is an acrylic resin or a polyester resin and has a side chain terminal group represented by the general formula (I): -COO-MO-COR1 (I) [in the formula (I), M it is zinc or copper and R1 is an organic group]； (a2) a metal salt-containing copolymer having a component unit derived from a monomer (a21) represented by the general formula (II): CH2>； = C (R2) -COO-MO-CO-C ( R2)>； = CH2 (II) [in formula (II), M is zinc or copper and R2 is a hydrogen atom or a methyl group], and a component unit derived from another unsaturated monomer (a22) copolymerizable with the monomer (a21)； and (a3) a silyl ester copolymer having a component unit derived from a monomer (a31) represented by the general formula (III): R7-CH>； = C (R3) -COO-SiR4R5R6 (III) [in the formula (III), R3 is a hydrogen atom or a methyl group, R4, R5 and R6 are each independently a hydrocarbon group, and R7 is a hydrogen atom or R8-O-CO- (where R8 is a organic group or a silyl group represented by -SiR9R10R11, in which R9, R10 and R11 are each independently a hydrocarbon group)] and optionally a component unit derived from another unsaturated monomer (a32) copolymerizable with the monomer (a31), and wherein the antifouling agent (B) comprises at least one compound represented by the following structural formula: ** Formula **Una composición de recubrimiento antiincrustante que comprende un copolímero hidrolizable (A) y un agente antiincrustante (B), en la que el copolímero hidrolizable (A) es al menos un copolímero hidrolizable seleccionado del grupo que consiste en: (a1) un copolímero que contiene enlace de sal de metal que es una resina acrílica o una resina de poliéster y tiene un grupo terminal de cadena lateral representado por la fórm
