A transferring device for transferring moulded parts applicable to plastic injection moulds of the type comprising: a row of a number n of pairs of half-moulds, wherein n is an integer equal to or greater than 1, which half-moulds, if n is greater than 1, are separated in a first transverse direction perpendicular to a longitudinal direction by a distance md, wherein m is an integer equal to or greater than 2, and supported on slides operated for moving said half-moulds in a second transverse direction perpendicular to said first transverse direction between open half-mould positions and closed half-mould positions; a row of a number mn of cores separated in the first transverse direction by said distance d and supported in a core-carrying plate operated for transferring said cores in said longitudinal direction between open mould position and closed mould position, and the cores are operated by operating means for being transferred with respect to said core-carrying plate in the first transverse direction between a number m of operating positions in each of which a different fraction 1/m of alternating cores of the cores are arranged in relation with the half-moulds, wherein moulded parts (P1, P) are transferred by the cores between said operating positions, characterized in that: said slides are supported in an ejecting plate having an elongated slot in the first transverse direction; the cores are inserted through said slot; and the slot is sized to allow transferring the cores on the core-carrying plate along the length thereof between the different operating positions. a row of a number n of pairs of half-moulds, wherein n is an integer equal to or greater than 1, which half-moulds, if n is greater than 1, are separated in a first transverse direction perpendicular to a longitudinal direction by a distance md, wherein m is an integer equal to or greater than 2, and supported on slides operated for moving said half-moulds in a second transverse direction perpendicular to said first transverse direction between open half-mould positions and closed half-mould positions; a row of a number mn of cores separated in the first transverse direction by said distance d and supported in a core-carrying plate operated for transferring said cores in said longitudinal direction between open mould position and closed mould position, and the cores are operated by operating means for being transferred with respect to said core-carrying plate in the first transverse direction between a number m of operating positions in each of which a different fraction 1/m of alternating cores of the cores are arranged in relation with the half-moulds, wherein moulded parts (P1, P) are transferred by the cores between said operating positions, characterized in that: said slides are supported in an ejecting plate having an elongated slot in the first transverse direction; the cores are inserted through said slot; and the slot is sized to allow transferring the cores on the core-carrying plate along the length thereof between the different operating positions. said slides are supported in an ejecting plate having an elongated slot in the first transverse direction; the cores are inserted through said slot; and the slot is sized to allow transferring the cores on the core-carrying plate along the length thereof between the different operating positions.