Filter device

A filter device, comprising:

• a device housing including an accommodating member being attached in said device housing, having an accommodating space and having a polygon-shaped first wall member, said accommodating space being delimited radially outwardly by said first wall member of said accommodating member and being delimited radially inwardly by a circular wall member on said accommodating member;
• and
• a filter element removably accommodated in said device housing, said filter element including an element material extending between first and second end members, said second end member having a second wall member with a polygonal shape inserted into said accommodating space, said first and second wall members of said accommodating member and of said second end member, respectively, are disposed adjacent and facing each other in said accommodating space, said second end member having a circular transfer space therein, said circular wall member of said accommodating member extending through said circular transfer space.