A lid-opening/closing device for a storage container provided with a container body storing therein an object to be stored, a lid portion forming a bottom portion openable and closable with respect to the container body and on which the object to be stored is placed, and a locking mechanism performing unlocking and locking the lid portion with respect to the container body, the lid-opening/closing device opening and closing the lid portion with respect to the container body and comprising: a device body on which the storage container is placed; a plurality of moving units, each of which includes an engaging portion configured to engage with the locking mechanism when the storage container is placed on the device body, and performs unlocking operation to cause the locking mechanism to perform the unlocking and locking operation to cause the locking mechanism to perform the locking by moving the engaging portion; a linkage unit configured to cause the moving units to perform the unlocking operation by moving the moving units in conjunction with each other when causing the locking mechanism to perform the unlocking, and to cause the moving units to perform the locking operation by moving the moving units in conjunction with each other when causing the locking mechanism to perform the locking; and one actuator that is provided for the moving units and the linkage unit and that is configured to simultaneously drive the moving units and the linkage unit, and each of the moving units further includes a first rotating member that is rotatably supported by the device body and is configured to move the engaging portion, characterized in that the linkage unit includes a first connecting member that connects at least a pair of the first rotating members to rotate the first rotating members, the pair of the first rotating members connected by the first connecting member is provided in a plurality of pairs so that the respective pairs are positioned on one side and on the opposite side of the lid portion when the storage container is placed on the device body, and the linkage unit further includes: a pair of second rotating members that are rotatably supported by the device body and to which the respective first connecting members are connected; and a second connecting member that connects the pair of the second rotating members to rotate the second rotating members. a device body on which the storage container is placed; a plurality of moving units, each of which includes an engaging portion configured to engage with the locking mechanism when the storage container is placed on the device body, and performs unlocking operation to cause the locking mechanism to perform the unlocking and locking operation to cause the locking mechanism to perform the locking by moving the engaging portion; a linkage unit configured to cause the moving units to perform the unlocking operation by moving the moving units in conjunction with each other when causing the locking mechanism to perform the unlocking, and to cause the moving units to perform the locking operation by moving the moving units in conjunction with each other when causing the locking mechanism to perform the locking; and one actuator that is provided for the moving units and the linkage unit and that is configured to simultaneously drive the moving units and the linkage unit, and each of the moving units further includes a first rotating member that is rotatably supported by the device body and is configured to move the engaging portion, characterized in that the linkage unit includes a first connecting member that connects at least a pair of the first rotating members to rotate the first rotating members, the pair of the first rotating members connected by the first connecting member is provided in a plurality of pairs so that the respective pairs are positioned on one side and on the opposite side of the lid portion when the storage container is placed on the device body, and the linkage unit further includes: a pair of second rotating members that are rotatably supported by the device body and to which the respective first connecting members are connected; and a second connecting member that connects the pair of the second rotating members to rotate the second rotating members.