A system for washing and treating infants includes components for keeping an infant under controlled sterile and warm conditions. The system also includes a device for washing the infant, which has a support frame and a flexible laminar element adapted to be secured thereto. The frame and the laminar element define a housing for receiving the infant while he/she is being washed and/or treated. The housing is adapted to be introduced into the washing and treating components and is accessible from outside. The frame has a single-unit structure composed of tubular members made of a medical-grade sterilizable metal or non-metal material.