An endoscopic system (1) is composed by connecting an endoscope (10) and peripheral equipment (140). The endoscope (10) has an endoscope main body (20), and an imaging unit (100), which is slender imaging optics. The endoscope (10) is constructed so that the endoscope main body (20) and imaging unit (100) are freely connectable and separable. The endoscope main body (20) has an insertion part (30) which is inserted into an abdominal cavity, a branch member (40), which is a middle end of the endoscope main body (20), and provided in a proximal end portion of the insertion part (30), a first extension part (60) provided in the proximal end portion of the branch member (40), a main body operation unit (61) provided in a proximal end portion of the first extension part (60), a universal cord (70), and a connection unit (80), which is provided in a proximal end portion of the universal cord, and is connected to the peripheral equipment (140).
