Abstract: Method and device for the local composting and drying of organic wastes, which is employed for the collection and aerobic conversion on the spot of organic wastes so as to obtain a finished product, compost, intended for use as an agricultural improvement material. A bag-type container (11) is filled with those organic wastes (19), the container (11) having at least flexible walls permeable to air, the container (11) cooperating in its interior with a tube (13) which is at least partially perforated and is closed at its lower end, the tube (13) being associated outside the container (11) with a fan (18), the fan (18) being activated to create a forced circulation of air within the container (11) in order to achieve conversion of the organic wastes (19) into compost and possible drying thereof.