A circuit module includes a circuit board including an insulating layer, first and second signal conductors, a ground conductor, and a ground conductor layer; and an electronic component including first and second signal terminals and a first ground terminal. The ground conductor includes a first strip portion parallel to the first and second signal conductors. When a portion of the first signal conductor parallel to the second signal conductor and the first signal terminal are set as a first signal wiring line and a portion of the second signal conductor parallel to the first signal conductor and the second signal terminal are set as a second signal wiring line, the circuit board includes a first strip portion connection via conductor that connects the first strip portion and the ground conductor layer in a region where the first and second signal wiring lines are parallel to each other.