Automatic machine for inserting in an homogeneous and metered manner into stuffed articles of various kind, in particular but not exclusively clothes articles, of stuffing material of various kind such as for example polyester fibres, plumage and the like, adapted to maintain the heat into the same articles, comprising a collecting and stocking container (5) of the stuffing material, adapted to contain the stuffing material (40) being picked up by means of transfer means (33, 36) from bags or containers provided by the producing and transforming firms of the same material, the machine comprising also weighing containers (45) communicating with said container (5), and loading cells (53) of the stuffing material loaded into the weighing containers (45), for weighing the quantities of the stuffing material to be inserted into the pockets or spaces (85) of each clothes article, comprising injection means (injection station 7) of the stuffing material into the pockets or spaces of each clothes article, and a control panel (8) including a main control device connected in the machine electric circuit and adapted to set, control and survey the different operative programs of the machine, and wherein said collecting and stocking container (5) is constituted by an upper chamber (19) and an underlying lower chamber (20), communicating to each other and enclosed and supported on the upper part of a metallic vertical structure (9), which is projected downward for forming a lower part supported on to the floor by vertical legs (22, 23, 24, 25), wherein said weighing containers (45) communicate at the lower part with said lower chamber (20) and are adapted to collect and weigh the stuffing material fallen from said lower chamber (20), in such metered quantities as to fill a pocket or space at a time of each clothes article, wherein said loading cells (53) are each one formed by at least an electric or electronic sensor, a balance or the like, disposed below the relative weighing container (45) of the machine and adapted to detect the weight of the stuffing material contained into the same container, and to generate correspondent electric or electronic signals corresponding to the weight which has been detected from time to time, which signals are transmitted through the machine electrical circuit toward said main control device, which provides for recognizing the same signals and indicating the correspondent weight which has been measured, and the so weighed quantity of stuffing material contained into each weighing container (45) is transferred from this latter toward said injection station (7) for being introduced into the pockets or spaces of each clothes article.