A robot is provided in a Cartesian space. The robot is provided with a linear movement rail, a movable body, a swing arm, a linear movement arm. The linear movement rail extends in parallel with the X-axis direction. The movable body is linearly moved in the X-axis direction along the linear movement rail. The swing arm has a first end and a second end. The first end is rotatably connected to the movable body around an R-axis (which is a swing axis) extending in a horizontal direction which is orthogonal to the X-axis direction and the second end extends radially from the R-axis. The linear movement arm, which is connected to the second end of the swing arm, moves a wrist unit in the Y-axis direction which is in parallel with the R-axis. A task tool is loaded to the wrist unit.