A cable water stop structure for a cable that includes plural insulated wires and a sheath covering the plural insulated wires includes a heat shrinkable tube that is shrunk to wrap around an end of the sheath and the plurality of insulated wires extending from the end, and a cover that is attached to sandwich the end of the sheath, the plurality of insulated wires extending from the end and the heat shrinkable tube. The cover includes a gripping portion gripping the heat shrinkable tube to restrict the heat shrinkable tube from moving along a cable longitudinal direction.