To provide a fire compartment penetrating part structure having excellent construction efficiency and fire resistance.

This fire compartment penetrating part structure includes at least a through-hole formed in a partition part which defines a fire compartment formed in a building; cables-pipes extending through the through-hole, a fire resistant putty, and a bag for filling. The fire resistant putty and the bag for filling are disposed between the through-hole and the cables-pipes. The bag for filling includes at least a packaging material including at least one part selected from a group comprising (1) flexible small pieces, (2) small pieces of thermally expandable refractories, and (3) cloth, film, or sheet for packaging the (1) and (2).