Provided is an imaging unit capable of reducing noise that occurs in an image signal generated by an imaging element. An imaging unit (240) provided at a tip portion (24) of an endoscope includes an imaging element (242) that generates an electrical signal by receiving light and performing photoelectric conversion, an oscillator (243) that generates a clock signal for driving the imaging element (242), an photoelectric element (244) that converts the electrical signal generated by the imaging element (242) into an optical signal and outputs it to the outside, and a regulator (245) that converts electric power input from the outside into electric power depending on each of the imaging element (242), the oscillator (243), and the photoelectric element (244) and supplies the converted electric power thereto. At the tip portion (24), the imaging element (242) is spaced farther than the oscillator (243) and the photoelectric element (244) from the regulator (245).
