developing device and image forming apparatus using the same

The disclosed developing device, the toner is accommodated, and the toner supply member is provided a toner storage portion and, located in the toner storage portion upper side and is the toner accommodated is supplied from the toner storage section by the toner supplying member supplies the toner to the developing roller and the developing roller supplying rollers are provided the developing part and, separate parts of the toner storage section and developing, and is positioned below the lowermost bent portion of the feed roller comprises a partition wall with an opening which forms a passage of the toner to be supplied to the developer from a toner storing portion provided.