Antifouling coating composition, antifouling coating film and antifouling substrate, and method for producing antifouling substrate

An antifouling coating composition, comprising a silylacrylic copolymer (A) which comprises:

• a structural unit (1) derived from triisopropylsilyl methacrylate (i);
• a structural unit (2) derived from triisopropylsilyl acrylate (ii);
• and
• a structural unit (3) derived from a polymerizable monomer having a polymerizable double bond (iii), which excludes the (i) and (ii), wherein
• a content weight ratio ([(1)+(2)]/(3)) of a total weight ((1)+(2)) of the structural unit (1) and the structural unit (2) to a content weight of the structural unit (3) is from 50/50 to 90/10, and
• a content weight ratio ((1)/(2)) of the content weight of the structural unit (1) to the content weight of the structural unit (2) is more than 50/50 and not more than 95/5.