An endoscope (10) comprises: an observation optical system (50) including a prism (70), the observation optical system (50) being configured to receive an observed image； an image pickup device (100) attached to the prism (70), the image pickup device (100) being configured to convert the observed image taken by the observation optical system (50) into a video signal with a solid-state image pickup element (102)； a drive circuit (80) electrically connected with the image pickup device (100)； a light guide (90) configured to radiate a light from an illumination light source； a forceps opening (56)； a frame (114) configured to surround a periphery of the image pickup device (100) and the prism (70) on three or more sides； and an insulative resin (112) which is accommodated in the frame (114).
