The invention provides a semiconductor device, a method of manufacturing the same, an electro-optic device and an electronic apparatus which are capable of addressing or solving a problem of mechanical mounting of a semiconductor element chip on a substrate. The electrophotographic belt showing electroconductivity resulting from dissociation of an electrolyte is made of a resin composition containing a crystalline resin as a binder resin, an oil-soluble dye and an electrolyte. When the motor generator is made to function as a motor, rotation on the input side of the clutch is assisted. The power of the light emitting device is supplied by at least one battery. Dark leakage and crosstalk are thus suppressed. The endoscope further includes a switching device which switches the first and second image pick-up portions.