Abstract: A developer supply container detachably mountable to developer receiving apparatus, includes container body accommodating a developer, the container body being provided with a developer supply port for supplying the developer through a developer receiving port provided in the developer receiving apparatus; a driving connecting member for operatively connecting to a driving member provided in the developer receiving apparatus, the driving connecting member being movable relative to the container body; and an interrelating mechanism for interrelating movement of the driving connecting member with movement of the developer supply port to face the developer receiving port.