A bag transfer device, which comprises: a table that intermittently rotates by a constant angle around a vertical axis thereof within a horizontal plane, a plurality of pairs of grippers that are disposed around the table and moved along a circular movement path as the table rotates, and a spacing adjustment mechanism that increases or decreases a spacing within the horizontal plane of the pair of grippers while the plurality of pairs of grippers are being moved along the movement path; and in which each gripper is composed of an arm and a clamping component installed at a distal end of the arm, the clamping components of the grippers clamp side portions of a bag, and the bag is transferred along a circular transfer path; wherein the spacing adjustment mechanism comprises: an arm support mechanism disposed at each arm of the grippers, and a drive force transmission mechanism that operates the arm support mechanism, and the bag transfer device characterized in that the spacing adjustment mechanism further comprises: a gripper layout adjustment mechanism that adjusts layout of the grippers using a vertical plane passing through said axis as a reference plane; and an operation of the gripper layout adjustment mechanism allows desired setting of: a reference layout in which the pair of grippers are laid out opposite each other and spaced apart equally with the reference plane in between, or an eccentric layout in which the grippers are laid out opposite each other at mutually different spacings with the reference plane in between can be set as desired, wherein the gripper layout adjustment mechanism comprises: an adjustment ring that is installed on the table and is rotated intermittently along with the table and that is capable of rotating relative to the table around the axis of the table, and a ring drive mechanism that rotates the adjustment ring; a pair of first links is provided so that one end of each one of the first link is, as part of the drive force transmission mechanism, linked to the arm support mechanism of each one of the grippers; a pair of second links is provided so that one end of each one of the second links is linked to another end of each one of the first links, and wherein another end of one of the second links being linked to the adjustment ring and another end of another one of the second links being linked to the table; and when the ring drive mechanism is operated, the adjustment ring is rotated, and drive force caused thereby is transmitted through said one of the second links and the first link linked thereto to one of the arm support mechanisms, so that the arm support mechanism is operated to adjust the layout of the grippers. a table that intermittently rotates by a constant angle around a vertical axis thereof within a horizontal plane, a plurality of pairs of grippers that are disposed around the table and moved along a circular movement path as the table rotates, and a spacing adjustment mechanism that increases or decreases a spacing within the horizontal plane of the pair of grippers while the plurality of pairs of grippers are being moved along the movement path; and an arm support mechanism disposed at each arm of the grippers, and a drive force transmission mechanism that operates the arm support mechanism, and the bag transfer device characterized in that the spacing adjustment mechanism further comprises: a gripper layout adjustment mechanism that adjusts layout of the grippers using a vertical plane passing through said axis as a reference plane; and an operation of the gripper layout adjustment mechanism allows desired setting of: a reference layout in which the pair of grippers are laid out opposite each other and spaced apart equally with the reference plane in between, or an eccentric layout in which the grippers are laid out opposite each other at mutually different spacings with the reference plane in between can be set as desired, a gripper layout adjustment mechanism that adjusts layout of the grippers using a vertical plane passing through said axis as a reference plane; and an operation of the gripper layout adjustment mechanism allows desired setting of: a reference layout in which the pair of grippers are laid out opposite each other and spaced apart equally with the reference plane in between, or an eccentric layout in which the grippers are laid out opposite each other at mutually different spacings with the reference plane in between can be set as desired, a reference layout in which the pair of grippers are laid out opposite each other and spaced apart equally with the reference plane in between, or an eccentric layout in which the grippers are laid out opposite each other at mutually different spacings with the reference plane in between can be set as desired, an adjustment ring that is installed on the table and is rotated intermittently along with the table and that is capable of rotating relative to the table around the axis of the table, and a ring drive mechanism that rotates the adjustment ring; a pair of first links is provided so that one end of each one of the first link is, as part of the drive force transmission mechanism, linked to the arm support mechanism of each one of the grippers; a pair of second links is provided so that one end of each one of the second links is linked to another end of each one of the first links,