Abstract: A collapsible pet carrier is lightweight and folds into an integral, flat sewn-in pocket for storage. The collapsible pet carrier includes an internal leash which safely secures a pet in place within the carrier while not unduly restricted the movement of the pet within the pet carrier during transport of the pet. The collapsible pet carrier includes an adjustable shoulder strap which can be worn cross body by the user so that the pet carrier will not slip from the body of the user. A screened ventilation panel moderates the internal air temperature of the pet carrier bag. The pet carrier is provided with a soft, rectangular shape during use, which minimizes the chances of a pet escaping or slipping out therefrom.