According to an aspect of the invention, an endoscopic apparatus outputs illuminating light from a tip of an endoscope inserting module to a subject and detects a reflected light from the subject to obtain an image signal of the subject. The endoscopic apparatus includes a first light source, a second light source, a target light intensity setting module, a light intensity ratio setting module, an information storing module, an amplitude value setting module, a driving signal generating module, a signal supplying module.