A touch panel support structure that can transfer vibration of a touch panel to the operator even though a transparent protective plate is in tight contact with the surface of a case is provided. The panel is supported by a sewing table. The wall is formed from hardenable construction material such as concrete poured between two mold members with the form liners attached to at least one of the mold members. In this embodiment, the socket opening is capable of engaging the terminal end of the tension rod. The land portion includes, a squish-land portion formed between the ring-groove portion and the squish-area making portion, an outer-edge-land portion formed between the ring-groove portion and said outer edge portion, the outer-land portion being smaller than the squish-land portion in height.