A parallel link mechanism comprising: a proximal end side link hub ; a distal end side link hub ; and three or more link mechanisms that connect the distal end side link hub to the proximal end side link hub in a position-changeable fashion, each of the link mechanisms including: a proximal side end link member , one end of the proximal side end link member being pivotably connected to the proximal end side link hub ; a distal side end link member , one end of the distal side end link member being pivotably connected to the distal end side link hub ; and an intermediate link member whose opposite ends being pivotably connected to the other ends of the proximal side end link member and the distal side end link member , respectively, and each of the link mechanisms having such a shape that a geometric model of the link mechanism represented by lines shows symmetry between a proximal end side portion thereof and a distal end side portion thereof with respect to an intermediate portion of the intermediate link member , wherein a revolute pair between the proximal end side link hub and the one end of the proximal side end link member , a revolute pair between the distal end side link hub and the one end of the distal side end link member , and revolute pairs between the other ends of the proximal side and distal side end link members and the opposite ends of the intermediate link each has a bearing interposed therein, characterized in that as each bearing , a bearing that has a critical oscillation angle smaller than the maximum value in a possible range of a bending angle which is defined as an angle between a central axis (QA) of the proximal end side link hub and a central axis (QB) of the distal end side link hub is employed. a proximal end side link hub ; a distal end side link hub ; and three or more link mechanisms that connect the distal end side link hub to the proximal end side link hub in a position-changeable fashion, each of the link mechanisms including: a proximal side end link member , one end of the proximal side end link member being pivotably connected to the proximal end side link hub ; a distal side end link member , one end of the distal side end link member being pivotably connected to the distal end side link hub ; and an intermediate link member whose opposite ends being pivotably connected to the other ends of the proximal side end link member and the distal side end link member , respectively, and a proximal side end link member , one end of the proximal side end link member being pivotably connected to the proximal end side link hub ; a distal side end link member , one end of the distal side end link member being pivotably connected to the distal end side link hub ; and an intermediate link member whose opposite ends being pivotably connected to the other ends of the proximal side end link member and the distal side end link member , respectively, and each of the link mechanisms having such a shape that a geometric model of the link mechanism represented by lines shows symmetry between a proximal end side portion thereof and a distal end side portion thereof with respect to an intermediate portion of the intermediate link member , wherein a revolute pair between the proximal end side link hub and the one end of the proximal side end link member , a revolute pair between the distal end side link hub and the one end of the distal side end link member , and revolute pairs between the other ends of the proximal side and distal side end link members and the opposite ends of the intermediate link each has a bearing interposed therein, <EOS>