Warping of a hybrid integrated circuit device 10 due to shrinkage on curing of a sealing resin 14 is suppressed. The hybrid integrated circuit device 10 includes: a conductive pattern 13 provided on a surface of a circuit board 11; circuit elements 15 fixed to the conductive pattern 13; thin metal wires 17 electrically connecting the circuit elements 15 to the conductive pattern; leads 16 which are connected to the conductive pattern 13 to become output or input and extended to the outside; and a sealing resin 14 which is made of a thermosetting resin and covers the circuit board 11 by transfer molding while at least a rear surface of the circuit board is exposed. Here, a thermal expansion coefficient of the sealing resin 14 is set to be smaller than a thermal expansion coefficient of the circuit board 11. Thus, warping of the circuit board 11 in an after cure step can be prevented.