A liquid supplying system comprising: a base on which a container containing a liquid is placed; a hollow needle having a steeple portion; a first moving mechanism moving the needle between a first needle position at which the steeple portion is away from the container and a second needle position at which the steeple portion penetrates a wall of the container; a hollow tube having an outer diameter smaller than an inner diameter of a lumen of the needle; and a second moving mechanism moving the tube between a first tube position at which the tube is away from the container and a second tube position at which the tube penetrates through the lumen of the needle located at the second needle position and enters the inside of the container; characterized by: a housing forming a chamber housing the container placed on the base; an opening formed in the housing for housing the container in the chamber and taking out the container from the chamber; a door movably supported between an open position for opening the opening and a closed position for closing the opening; and a mechanism to unlock the door to make the door movable between the open position and the closed position when the steeple portion is at the first needle position and lock the door at the closed position when the steeple portion is at the second needle position, in conjunction with the first moving mechanism. a base on which a container containing a liquid is placed; a hollow needle having a steeple portion; a first moving mechanism moving the needle between a first needle position at which the steeple portion is away from the container and a second needle position at which the steeple portion penetrates a wall of the container; a hollow tube having an outer diameter smaller than an inner diameter of a lumen of the needle; and a second moving mechanism moving the tube between a first tube position at which the tube is away from the container and a second tube position at which the tube penetrates through the lumen of the needle located at the second needle position and enters the inside of the container; characterized by: a housing forming a chamber housing the container placed on the base; an opening formed in the housing for housing the container in the chamber and taking out the container from the chamber; a door movably supported between an open position for opening the opening and a closed position for closing the opening; and a mechanism to unlock the door to make the door movable between the open position and the closed position when the steeple portion is at the first needle position and lock the door at the closed position when the steeple portion is at the second needle position, in conjunction with the first moving mechanism. a housing forming a chamber housing the container placed on the base; an opening formed in the housing for housing the container in the chamber and taking out the container from the chamber; a door movably supported between an open position for opening the opening and a closed position for closing the opening; and a mechanism to unlock the door to make the door movable between the open position and the closed position when the steeple portion is at the first needle position and lock the door at the closed position when the steeple portion is at the second needle position, in conjunction with the first moving mechanism.