The present invention relates to a silicone baby bottle which is made of silicone which does not generate environmental hormones. This allows an infant or young child to be safely fed. The silicon baby bottle includes a body part (10), a nipple (20), and a coupling means composed of a first coupling ring (30) and a second coupling ring (40) which are screwed with each other to be coupled. The body part (10) and nipple (20) are made of silicone which is a soft material and the coupling means (30, 40) is made of a rigid material so that a coupled structure of the body part (10) and nipple (20) can be tightly sealed. Since only the body part (10) and nipple (20) made of silicone are allowed to come into contact with infant formula and infant's mouth, the infant is not exposed to environmental hormones attributable to synthetic resin.