Disclosed are a measurement device and a puncture device that prevent thermal loss and enable decreased cost in laser units. A laser unit (200) of a measurement device (100) is equipped with a lens barrel (210), a laser rod (220) disposed inside the lens barrel (210), a flash lamp (230) which is disposed opposite the laser rod (220) inside the lens barrel (210) and in which an inert gas is sealed inside a hard glass tube (231), and supports (241, 242, 243, 244), which are made from a material with thermal conductivity of 100 W/(mK) or more, at least parts of which are disposed outside of the lens barrel (210), and which support the circumferential surface of the hard glass tube (231) in a housing.
