A subcutaneous implantable port (11) is provided and includes a housing, septum, bottom plate and catheter connecting portion. The housing has a closed base (31) having a recess portion and a cover for covering the base. A bottom plate made from a material harder than the base is disposed on a bottom portion of an inner surface of the base. The bottom plate includes a plurality of corner portions (43) on an outer peripheral edge portion thereof. The plurality of corner portions bite into an inner surface of the recess portion from the circumferential direction of the bottom plate to affix the bottom plate to the base.
