The Authors, starting from a statistical study of Gennari et al., point out the frequency of the benign neoformations in the soft tissue of the oral cavity. They describe then the most frequently findable histological forms and the problems posed to the clinic and the surgeon by some histological forms such as the mixed tumours of the minor salivary glands and the fibropapillomatosis of the vestibular fornices. The Authors conclude stating that they not always are harmless neoformations and easily surgically excisable.