Abstract: The automatic coffee machine for preparing espresso coffee comprises at least one; infusion assembly (1) having an infusion piston (2) that can be actuated by motorized means (3), at least one container containing coffee beans to be ground, grinding means (4, 5) to grind the beans for preparing doses of ground coffee, conveying means to convey the doses of ground coffee into a filter-holder element (7) arranged under the piston, the grinding means (4, 5) comprising a first and a second grinder that are actuated by a first and a second opposite motor (8, 9) arranged laterally to the infusion piston.