To provide a microwave curable composition which can be cured with a small amount of energy even when a material such as a colorant attenuating or blocking microwave with which the material is irradiated, is present at high concentration or even when film thickness of a coating film is large.
The microwave curable composition includes: (1) a radical initiator (A); (2) an acid generator (B) and/or a base generator (C); and (3) a polymerizable material (D). At least one of the radical initiator (A), the acid generator (B) and the base generator (C) generates an active species (H) upon irradiation with microwave. The active species (H) reacts with the radical initiator (A), the acid generator (B) and/or the base generator (C) to generate a new active species (I), and polymerization reaction of the polymerizable material (D) under the new active species (I) proceeds, and the active species (H) or (I) is an acid or a base.