A rigid endoscope includes a first insertion section extending along longitudinal directions, a first needle defining an outer edge of a first opening, and a first functional section provided in a vicinity of the first opening of a first lumen, and configured to perform some part of functions. The rigid endoscope includes a second insertion section extending along the longitudinal directions, and located apart from the first insertion section in directions perpendicular to the longitudinal directions, a second needle defining an outer edge of a second opening, and a second functional section provided in a vicinity of the second opening of a second lumen, and configured to perform some part of the functions different from the functions performed by the first functional section.