A link actuating device comprising: a proximal end side link hub; a distal end side link hub; and three or more link mechanisms via which the distal end side link hub is coupled to the proximal end side link hub such that a posture of the distal end side link hub can be changed relative to the proximal end side link hub, each of the link mechanisms including: a proximal side end link member rotatably coupled at one end thereof to the proximal end side link hub; a distal side end link member rotatably coupled at one end thereof to the distal end side link hub; and an intermediate link member rotatably coupled at both ends thereof to other ends of the proximal side and distal side end link members (15, 16); a posture control drive source is provided to each of two or more link mechanisms of the three or more link mechanisms and configured to arbitrarily change the posture of the distal end side link hub relative to the proximal end side link hub; a storage unit configured to store therein an operating position of the posture control drive source when the distal end side link hub is in a defined posture relative to the proximal end side link hub; a positioning member configured to position the distal end side link hub in the defined posture by restricting postures of a plurality of the link members relative to each other, and a positioning portion on which the positioning member is detachably mounted, and characterised in that the positioning member is provided to at least one link member of the proximal side end link member, the distal side end link member, and the intermediate link member in each of the two or more link mechanisms of the three or more link mechanisms; wherein the positioning portion is provided to the intermediate link member; and wherein the positioning portion is a through hole into which the positioning member is able to be inserted, and a central axis of the through hole passes through a plane including a point at which a central axis (O2A) of a revolute pair between the proximal side end link member and the intermediate link member of each link mechanism and a central axis (O2B) of a revolute pair between the distal side end link member and the intermediate link member of each link mechanism intersect each other, and intersects a point of intersection between a central axis of the proximal end side link hub and a central axis of the distal end side link hub. a proximal end side link hub; a distal end side link hub; and three or more link mechanisms via which the distal end side link hub is coupled to the proximal end side link hub such that a posture of the distal end side link hub can be changed relative to the proximal end side link hub, each of the link mechanisms including: a proximal side end link member rotatably coupled at one end thereof to the proximal end side link hub; a distal side end link member rotatably coupled at one end thereof to the distal end side link hub; and an intermediate link member rotatably coupled at both ends thereof to other ends of the proximal side and distal side end link members (15, 16); a posture control drive source is provided to each of two or more link mechanisms of the three or more link mechanisms and configured to arbitrarily change the posture of the distal end side link hub relative to the proximal end side link hub; a storage unit configured to store therein an operating position of the posture control drive source when the distal end side link hub is in a defined posture relative to the proximal end side link hub; a positioning member configured to position the distal end side link hub in the defined posture by restricting postures of a plurality of the link members relative to each other, and a positioning portion on which the positioning member is detachably mounted, and wherein the positioning portion is provided to the intermediate link member; and wherein the positioning portion is a through hole into which the positioning member is able to be inserted, and a central axis of the through hole passes through a plane including a point at which a central axis (O2A) of a revolute pair between the proximal side end link member and the intermediate link member of each link mechanism and a central axis (O2B) of a revolute pair between the distal side end link member and the intermediate link member of each link mechanism intersect each other, and intersects a point of intersection between a central axis of the proximal end side link hub and a central axis of the distal end side link hub.