Abstract: A chain mold comprises a supporting construction which is constituted by two shoulders supporting an upper shaft and axle and a bottom shaft and axle, all having horizontal parallel rotary axes, and on each of which is mounted a gear wheel, on the upper gear wheels being entrained an upper chain, whereas on the bottom gear wheels is entrained a bottom chain. The two chains have chain links which are mutually faced along a vertical intermediate plane and sequentially define dihedrical shape articles. The articles arranged on the bottom chain are provided with a cutting edge for cutting the food product bead. Each link of the upper chain slidably supports, along the dihedral shape articles, a pair of controllably movable half-molds, which can be mutually moved toward or away from a corresponding pair of half-molds supported by the opposite link in order to form a piece of food product from a food product bead supplied along the intermediate plane.