A robot that includes a base that is provided with a flat installation surface member that is disposed on an installation target surface and a columnar member that extends upward from the installation surface member; and a first arm, one end of which is supported so as to be rotatable about a first horizontal axis located above the columnar member of the base and that has a motion range below the first horizontal axis. The columnar member has a length that is equal to or longer than the length of the first arm and has a uniform transverse sectional area that is the same as the first arm.