Printed circuit board with improved heat dissipation efficiency, electronic apparatus having printed circuit board with improved heat dissipation efficiency, CRT display device having printed circuit board with improved heat dissipation efficiency, and recording/reproducing device or video display device incorporating recording/reproducing device having printed circuit board with improved heat dissipation efficiency

aa. The invention provides an electric apparatus having a printed circuit board with an improved heat dissipation capacity, and, in particular, to provide an electric apparatus requiring plural printed circuit boards that has an improved heat dissipation efficiency and can be produced at a low cost.A main printed circuit board and a sub board are composite-molded, and the sub board is formed at an area close to or immediately below a heat-generating electronic component or a heat dissipation plate . Thus, by separating the sub board off the main printed circuit board , a hole serving as a ventilating hole is formed in the main printed circuit board at the area close to or immediately below the heat-generating electronic component or the heat dissipation plate