Development device and image forming device that prevents toner leakage

A development device comprising:

• a development tank that stores a developer, the developer including a toner;
• a developer carrier that carries the developer;
• a first conveyance member and a second conveyance member that have rotary shafts being in parallel with each other and facing each other, that stir and convey the developer in the development tank, and that supply the developer to the developer carrier;
• an exhaust port through which air inside the development tank is exhausted;
• and
• a filter that is provided at the exhaust port and that collects the developer included in the exhausted air, wherein:
• the development tank is provided with:
• a first holder provided with the first conveyance member and disposed at a near side to the developer carrier,
• a second holder provided with the second conveyance member and disposed at a far side from the developer carrier,
• a partition wall that partitions the first holder and the second holder, and
• a first flow port and a second flow port that are provided, respectively, at both end portions in an axial direction along the rotary shafts of the first conveyance member and the second conveyance member, and that open the partition wall, the developer flowing from the second holder to the first holder through the first flow port, the developer flowing from the first holder to the second holder through the second flow port,
• a shield partitions the first holder and the exhaust port,
• the second holder is connected to the exhaust port, and is provided with an exhaust path above the second conveyance member, the exhaust path extending upward along the partition wall,
• the exhaust path is a gap having a width smaller than a width of the second conveyance member, and has a common space located, at a position higher than the shield, above both the first holder and the second holder,
• the exhaust port is located across and above the first holder and the second holder via the common space, and
• the filter is disposed in an inclined manner as a side of the second holder is higher than a side of the first holder.