The present invention has been made in consideration of the above-described situation, and provides a method of producing a circuit board that can bond a component to be mounted without slanting the component, and simplify the steps. The method of producing a circuit board includes forming a first adhesive layer by applying a first adhesiveness-imparting compound on the surface of terminal portions of a circuit board; attaching a core body on the first adhesive layer of the terminal portions; forming a second adhesive layer by applying a second adhesiveness-imparting compound on the surface of the core body; attaching first solder particles on the second adhesive layer of the surface of the core body; and forming a solder layer on the surface of the core body by melting the first solder particles.