Abstract: Automatic watering device for cultivation in pots or the like, which can be applied to flower-pots, flower-boxes or anything else (12) suitable for the cultivation of flowers and/or plants, the pots, boxes, etc. (12) being able to be newly constructed or already existing, the device being suitable to supply liquid automatically to wet cultivation substratum (28) positioned on the device, a main pot (12) cooperating with an underlying lower pot (13) through at least one conduit (22) having openings at its ends, the lower end of the conduit (22) being associated with retaining mesh means (23), the pot (12) containing at least one box-shaped container (11) having the function of an inner tank (26) and having openings (19) in the vicinity of its lower periphery, the box-shaped container (11) including bleeder means (24).