And filtered at least in the inlet (21) and an outer casing of rigid outlet (22) is provided for when a fluid is filtered in the fluid (2), disposed within the outer casing (2) Filter cartridge (3) and an internal combustion filter engine with. Filter cartridge (3) has an outer casing (2) of the inlet (21) from adapted to be passed by a fluid flowing toward the outlet (22), a plurality of tubular filtration wall arranged parallel to each other ( including the 30, 30 '). Outer casing (2) is adapted to define a pouch (24), the cross section taken along a plane perpendicular to the axis of the tubular filtering wall portion (30, 30 ') of the pouch (24), indicating the short width (B) to expand extending line (a) and expansion extending line (a). The tubular filtering wall portion (30, 30 ') are arranged alongside one another in the interior of the pouch (24) to form a single row along the expanded extension line (A) of the pouch (24).