An articulated robot having a low lowest posture, a long up-down stroke, and such rigidity that the predetermined positional accuracy can be secured is provided.It includes a first arm (42) which is rotatable about a first horizontal axis (43), a second arm (44) which is rotatable about a second horizontal axis (45) at the other end of the first arm (42), a third arm (46) which is rotatable about a third horizontal axis (47) at the other end of the second arm (44), an up-down table (48) which is rotatable about a fourth horizontal axis (49) at the other end of the third arm (46), a fourth arm which is rotatable about the first horizontal axis (43) and rotatable about the second horizontal axis (45) at its other end, a first parallel link mechanism (53), a second parallel link mechanism (56), and a third parallel link mechanism (58).