The present invention relates to a 
pacifier for infants used to comfort infants. More specifically, a 
silicone tube body (10), into which or from which air can be injected or discharged such that an infant feels the 
silicone tube body like a breast of the infant's mother when touching the 
silicone tube body, is coupled for use to a nipple-shaped nipple unit (50) by a secure 
coupling unit (30), and thus, due to the infant's touching of the 
silicone tube body, not only emotional security as if the infant were in the bosom of the infant's mother can be provided but also the development of the infant's brain can be beneficially stimulated, in comparison with traditional plastic pacifiers. Particularly, the nipple unit is not only simply coupled but also hermetically coupled by the secure 
coupling unit to a 
coupling ring formed at the front of the 
silicone tube body, and the 
silicone tube body has a valve through which air is smoothly injected or discharged, and thus the product not only can be assembled and taken apart for use but also provides great confidence and convenience of using air injection. In addition, when air is injected into the silicone tube body, the tube body is inflated not upward but downward so as to be prevented from blocking out the forward 
field of view of the infant sucking on the 
pacifier, and thus psychological security is more greatly provided for the infant.