A dough-stretching machine, which is particularly adapted to stretch pizza dough, comprising a frame associated with which are: - a support plane for the mass of dough to be stretched; - a dough-stretching unit arranged at the top and coaxially to said support plane according to the defined vertical axis of said frame; - movement means for moving said support plane towards/away from said dough-stretching unit; said dough-stretching unit comprising: - a modelling body configured to come into contact with said mass of dough; characterised in that said dough-stretching unit further comprises: - a plate in which a plurality of radial grooves are identified, each of which slidably houses a modelling element for said mass of dough; - kinematic means adapted to move said modelling elements along said radial grooves towards or away from said vertical axis; said kinematic means comprising: - a threaded shaft having one end operatively connected to motorisation means and the opposite end rotatably associated with said plate; - a central core provided with a nut fixed on said threaded shaft; - a plurality of rods each having one end hinged to one of said modelling elements and the opposite end hinged to said central core; said kinematic means being adapted to realise a compass movement of said plurality of rods and the consequent displacement of said modelling elements towards or away from said vertical axis when said motorisation means set said threaded shaft in rotation, causing the downward or upward displacement of said central core depending on the direction of rotation of said threaded shaft. - a support plane for the mass of dough to be stretched; - a dough-stretching unit arranged at the top and coaxially to said support plane according to the defined vertical axis of said frame; - movement means for moving said support plane towards/away from said dough-stretching unit; said dough-stretching unit comprising: - a modelling body configured to come into contact with said mass of dough; - a modelling body configured to come into contact with said mass of dough; characterised in that said dough-stretching unit further comprises: - a plate in which a plurality of radial grooves are identified, each of which slidably houses a modelling element for said mass of dough; - kinematic means adapted to move said modelling elements along said radial grooves towards or away from said vertical axis; - a plate in which a plurality of radial grooves are identified, each of which slidably houses a modelling element for said mass of dough; - kinematic means adapted to move said modelling elements along said radial grooves towards or away from said vertical axis; said kinematic means comprising: - a threaded shaft having one end operatively connected to motorisation means and the opposite end rotatably associated with said plate; - a central core provided with a nut fixed on said threaded shaft; - a plurality of rods each having one end hinged to one of said modelling elements and the opposite end hinged to said central core; - a threaded shaft having one end operatively connected to motorisation means and the opposite end rotatably associated with said plate; - a central core provided with a nut fixed on said threaded shaft; - a plurality of rods each having one end hinged to one of said modelling elements and the opposite end hinged to said central core; said kinematic means being adapted to realise a compass movement of said plurality of rods and the consequent displacement of said modelling elements towards or away from said vertical axis when said motorisation means set said threaded shaft in rotation, causing the downward or upward displacement of said central core depending on the direction of rotation of said threaded shaft.