The embodiment of the invention provides a spherical robot. The robot comprises a spherical shell, a head assembly and a head driving assembly, wherein the head assembly is arranged on the outer surface of the spherical shell, and the head driving assembly is contained in the spherical shell. The head driving assembly comprises a fixing support, a joint bearing, a first connecting rod, a guiding rail component, a guiding slide block, a first driving unit, a second driving unit and a shield, wherein the outer ring of the joint bearing is fixed to the fixing support, and the center of the joint bearing coincides with the sphere center of the spherical shell; the first connecting rod penetrates the inner ring of the joint bearing and is fixed to the inner ring, the other end of the first connecting rod is connected to the guiding slide block in a rotational mode, and the guiding slide block is installed on the guiding rail component, so that the first connecting rod and the shield rotate around the joint bearing, and the head assembly is driven to move on the outer surface of the spherical shell. According to the spherical robot, the effect that the head assembly is independently driven to move on the outer surface of the spherical shell can be achieved.