<p>A spot welding robot including a base (20) and an arm assembly mounted on the base. The arm assembly includes a lower arm (22) mounted at a lower end on the base for a swingable movement about a substantially horizontal first axis (21), a swingable member (42) mounted on the lower arm at an upper end portion of the lower arm for a swingable movement about a second axis (23) which is parallel with the first axis, and an upper arm (24) mounted at one end portion on the swingable member for a swingable movement about a third axis (26) which is perpendicular to the second axis. The swingable member has a portion extending in a direction opposite to the direction in which the upper arm extends. A driving motor (25) is provided on the swingable member for driving the upper arm to produce the swingable movement of the upper arm about the third axis.</p>
