A kneading machine for use in the processing of food doughs, to be used in bakeries, breadstick factories, pastries and confectionery industries in general, as well as for domestic use for the preparation of dough for bread, pizza and confectionery. This kneading machine is of the so-called mechanical arm type. The kneading machine is of the type that provides that the kneading tool (10) completes a trajectory which is extended beyond half and up to being extended for the entire diameter of the tub (V), in which the terminal part of said tool is arranged, where the shaped implement (9) is applied, which is immersed in the mass of the dough (P), both in the outward travel and in the return travel and which acts on the entire mass of the dough.