A parallel link mechanism comprising: a proximal end member; and three or more link mechanisms, wherein the three or more link mechanisms connect the proximal end member to a distal end member, the three or more link mechanisms are capable of changing a posture of the distal end member relative to the proximal end member, each of the three or more link mechanisms includes a first link member (4a, 4b, 4c) rotatably connected to the proximal end member at a first revolute pair unit, a second link member (6a, 6b, 6c) rotatably connected to the first link member (4a, 4b, 4c) at a second revolute pair unit, a third link member (7a, 7b, 7c) rotatably connected to the second link (6a, 6b, 6c) member at a third revolute pair unit, characterized by a fourth link member (8a, 8b, 8c) rotatably connected to the third link (7a, 7b, 7c) member at a fourth revolute pair unit, the fourth link member (8a, 8b, 8c) being rotatably connected to the distal end member at a fifth revolute pair unit, wherein in the three or more link mechanisms, a first center axis (15a, 15b, 15c) of the first revolute pair unit and a second center axis (16a, 16b, 16c) of the second revolute pair unit intersect at a spherical link center point, and fifth center axes of the respective fifth revolute pair units of the three or more link mechanisms overlap each other and intersect with the spherical link center point. a proximal end member; and three or more link mechanisms, wherein the three or more link mechanisms connect the proximal end member to a distal end member, the three or more link mechanisms are capable of changing a posture of the distal end member relative to the proximal end member, each of the three or more link mechanisms includes a first link member (4a, 4b, 4c) rotatably connected to the proximal end member at a first revolute pair unit, a second link member (6a, 6b, 6c) rotatably connected to the first link member (4a, 4b, 4c) at a second revolute pair unit, a third link member (7a, 7b, 7c) rotatably connected to the second link (6a, 6b, 6c) member at a third revolute pair unit, characterized by a fourth link member (8a, 8b, 8c) rotatably connected to the third link (7a, 7b, 7c) member at a fourth revolute pair unit, a first link member (4a, 4b, 4c) rotatably connected to the proximal end member at a first revolute pair unit, a second link member (6a, 6b, 6c) rotatably connected to the first link member (4a, 4b, 4c) at a second revolute pair unit, a third link member (7a, 7b, 7c) rotatably connected to the second link (6a, 6b, 6c) member at a third revolute pair unit, characterized by a fourth link member (8a, 8b, 8c) rotatably connected to the third link (7a, 7b, 7c) member at a fourth revolute pair unit, the fourth link member (8a, 8b, 8c) being rotatably connected to the distal end member at a fifth revolute pair unit, wherein in the three or more link mechanisms, a first center axis (15a, 15b, 15c) of the first revolute pair unit and a second center axis (16a, 16b, 16c) of the second revolute pair unit intersect at a spherical link center point, and fifth center axes of the respective fifth revolute pair units of the three or more link mechanisms overlap each other and intersect with the spherical link center point.