Antifouling coating composition

An antifouling coating composition comprising a photocurable organopolysiloxane (A), a slipping agent (B), and a photopolymerization initiator (C),

• the photocurable organopolysiloxane (A) having a content in a solid content of the antifouling coating composition of 50% by mass or more and 98% by mass or less,
• wherein the photocurable organopolysiloxane (A) is represented by the following formula (I),
• XpR1(3-p)SiO(SiR12O)m(SiXqR1(2-q)O)nSiXpR1(3-p) (I)
• wherein, in the formula (I), R1's each independently represent an alkyl group having 1 or more and 10 or less carbon atoms, an aryl group, an aralkyl group, an alkoxy group, or a halogenated alkyl group, X's each independently are a monovalent organic group having one or more (meth)acryloyl groups and containing no silicon atom, m represents 10 or more and 10,000 or less, n represents 0 or more and 50 or less, p's each independently are an integer of 0 or more and 2 or less, q's each independently are 1 or 2, and at least one of p and n is 1 or more.