An anticondensation device particularly for electric motors, comprising a box-like body that contains the stator windings inside which the enclosure for a rotor is arranged hermetically, a cover to be fixed over the bottom of the box-like body, spaced therefrom, to define an interspace and a perimetric air passage gap. The bottom has through holes, and corresponding first collars protrude perimetrically to the holes toward the cover and enter with play second collars that protrude from the cover toward the bottom. An air passage pathway is formed between the first and second collars. The box-like body is arranged in functional configuration with its bottom substantially vertical.