Abstract: A piston for reciprocating internal combustion engines, especially Diesel engines, is provided having a crown exposed to the heat of combustion gases, a guide member spaced from said crown, a shell connecting said crown and guide member, a ring carrier connected to the crown of said piston, sealing and oil control rings in said ring carrier, said ring carrier being connected to said crown by a constriction situated adjacent a straight line extending through the crown of the piston, said shell being formed at its end away from the crown with a base formed by two bifurcated legs, said legs being arranged symmetrically to a plane extending through the center of the piston and formed with eyes, a wrist pin in said eyes connecting said shell with said guide member, said shell being in the form of a truncated cone provided in its interior with a cavity constructed at least in one direction of the longitudinal axis of the piston.