An inkjet image forming apparatus comprising: an ink container configured to store an ink, wherein the ink container includes: an RFID tag; a pouch pack configured to contain the ink and to have a supply port discharging the ink; and a container case configured to house the pouch pack, wherein the container case has: a pack holding part configured to hold the pouch pack, to which the supply port is fixed; and a tag fixing part provided adjacent to the pack holding part and having a needle insertion part, to which the RFID tag is fixed at a distance from the pack holding part; and a container installed part to which the ink container is attached/detached, wherein the container installed part includes: an RFID sensing circuit board configured to carry out wireless communication with the RFID tag; a needle inserted in the needle insertion part; and an installation pipe including a fixed pipe part fixed on a circumference of the needle and a movable pipe part installed on a circumference of the fixed pipe part and configured to advance and retreat between a position exposing a top end part of the needle and another position covering the top end part of the needle. an ink container configured to store an ink, wherein the ink container includes: an RFID tag; a pouch pack configured to contain the ink and to have a supply port discharging the ink; and a container case configured to house the pouch pack, wherein the container case has: a pack holding part configured to hold the pouch pack, to which the supply port is fixed; and a tag fixing part provided adjacent to the pack holding part and having a needle insertion part, to which the RFID tag is fixed at a distance from the pack holding part; and an RFID tag; a pouch pack configured to contain the ink and to have a supply port discharging the ink; and a container case configured to house the pouch pack, wherein the container case has: a pack holding part configured to hold the pouch pack, to which the supply port is fixed; and a tag fixing part provided adjacent to the pack holding part and having a needle insertion part, to which the RFID tag is fixed at a distance from the pack holding part; and a pack holding part configured to hold the pouch pack, to which the supply port is fixed; and a tag fixing part provided adjacent to the pack holding part and having a needle insertion part, to which the RFID tag is fixed at a distance from the pack holding part; and a container installed part to which the ink container is attached/detached, wherein the container installed part includes: an RFID sensing circuit board configured to carry out wireless communication with the RFID tag; a needle inserted in the needle insertion part; and an installation pipe including a fixed pipe part fixed on a circumference of the needle and a movable pipe part installed on a circumference of the fixed pipe part and configured to advance and retreat between a position exposing a top end part of the needle and another position covering the top end part of the needle. an RFID sensing circuit board configured to carry out wireless communication with the RFID tag; a needle inserted in the needle insertion part; and an installation pipe including a fixed pipe part fixed on a circumference of the needle and a movable pipe part installed on a circumference of the fixed pipe part and configured to advance and retreat between a position exposing a top end part of the needle and another position covering the top end part of the needle.