Coating material composition, can lid, and can for food and beverages

The purpose of the present invention is to provide a coating material composition and a can lid having excellent contaminated content resistance and alkali resistance and capable of forming a coating film for which the workability does not easily decline with the passage of time. In order to solve this technical problem, the coating material composition comprises: a polyester resin (A) with an acid number of at most 30 mgKOH/g and with a glass transition temperature exceeding 25 degrees Celsius and at most 40 degrees Celsius; a polyester resin (B) with an acid number of at most 30 mgKOH/g and a glass transition temperature of 45-85 degrees Celsius; and a phenol resin (C). The polyester resin (A) is resin obtained by reacting a polycarboxylic acid (a) and a polyol (b), wherein, of a total 100 mol% of the polycarboxylic acid (a), it is preferable to comprise 15-35 mol% of terephthalic acid, 55-80 mol% of isophthalic acid, and 1-10 mol% of any monomer selected from the group consisting of sebacic acid, adipic ac