A carriage conveyance device which smoothly and quickly conveys molding flasks and molds, comprises a simple and inexpensive mechanism, and can reduce facility costs. A carriage conveyance device comprises: movement bodies (20, 22) which are provided corresponding to a first conveyance path (6) and a second conveyance path (8) and which reciprocate a given distance along the conveyance paths; loading-side engagement means (78) which are each provided to the upstream end position side of each of the movement bodies, the loading-side engagement means (78) being configured so that, when the movement body (20) advances to the downstream side of one (6) of the conveyance paths, the loading-side engagement means (78) engages with a carriage (4), which is located at a loading position of said conveyance path (6), and so that, when the movement body (20) recedes to the upstream side of said conveyance path (6), the loading-side engagement means (78) disengages from the carriage (4); unloading-side engagement means (80) which are each provided to the downstream end position side of each of the movement bodies (20, 22), the unloading-side engagement means (80) being configured so that, when the movement body (20) advances to the downstream side of said conveyance path (6), the unloading-side engagement means (80) engages with a carriage (4), which is located at the downstream end position of said conveyance path (6), to restrict the free movement of carriages in the downstream direction; and a drive means (28) which reciprocates the movement body (20) a given distance.