Development device and image forming apparatus

A development device comprising:

• a rotational member rotating around an axis;
• and
• a housing in which the rotational member and a toner are stored, wherein
• the housing includes:
• a lower housing having a concave first storage part having an opened upper face;
• and
• an upper housing having a concave second storage part having an opened lower face, and disposed above the lower housing, wherein
• the first storage part has a first edge portion around the opened upper face,
• the first edge portion has:
• a recess extending along the first edge portion, the recess having an opened upper face,
• a first contact face formed inside the recess;
• and
• a first opposite face formed outside the recess,
• the second storage part has a second edge portion around the opened lower face,
• the second edge portion has:
• a protrusion fitted into the recess;
• a second contact face coming into contact with the first contact face;
• and
• a second opposite face opposing the first opposite face, wherein
• the first contact face is higher than the first opposite face, the second contact face is higher than the second opposite face, and at least the recess and the protrusion are adhered with an adhesive.