Containing device for a treatment machine for loose products, provided internally with a treatment compartment that has at least an open side for loading the loose products to be treated, and for unloading the loose products that have been treated; the containing device comprises at least a first loading door for the loose products to be treated, positioned on a first portion of said open side and associated with at least a respective opening and closing unit, and at least a second unloading door for the loose products that have been treated, positioned on a second portion of said open side and associated with at least a respective opening and closing unit.