A new and improved pacifier including a novel nipple structure is disclosed. The nipple structure includes a short nipple that allows the tongue, during sucking and swallowing, to be naturally positioned adjacent to the hard palate. The nipple structure includes a thin and pliable web which extends beyond the tip of the nipple and, in use, is received between the tongue and the palate. Preferably, the web terminates near the mid-point, front to back, of the hard palate of a user. The web is so thin and pliable that it will deform to conform to the shape of a hard palate when pressed by a tongue thereagainst. Preferably, the web has a featheredge. The web, when received between the tongue and the hard palate, will facilitate the retention of the pacifier in the mouth.