Method for producing resin molded body

A method for producing a resin molded body, the resin molded body including a thermosetting resin member made of thermosetting resin and a thermoplastic resin member made of a thermoplastic resin, the thermoplastic resin member sealing a sealed surface that is at least a part of a surface of the thermosetting resin member, the method comprising:

• forming the thermosetting resin member by heating a thermosetting resin material that is a raw material of the thermosetting resin member to complete a curing of the thermosetting resin material;
• forming a nascent surface having a functional group on at least a part of the sealed surface by removing a surface layer that is an outermost layer of the sealed surface via irradiation of laser light to the sealed surface of the thermosetting resin member;
• and
• sealing the sealed surface of the thermosetting resin member with the thermoplastic resin member and chemically bonding the functional group of the nascent surface to a functional group of an additive contained in the thermoplastic resin member by injecting a thermoplastic resin material to the thermosetting resin member having the nascent surface, the thermoplastic resin material being a raw material of the thermoplastic resin member and containing the additive having the functional group capable of chemically bonding to the functional group of the nascent surface, wherein
• the thermosetting resin member has an absorption of the laser light at or above 10% per 1 μm.