Protector with sensor and method of molding end part of the same

A protector (10) with a sensor (80) is installed on a sliding door (1) for detecting an alien substance by touch between two core wires (31,32) in a hollow part (12). In a terminal part of the protector with the sensor, the core wires drawn out are connected with legs of a resistor (39). A primary seal (100) is formed by grinding a surface of the hollow part (12) of the terminal part of an extrusion molded part, positioning a ground part (51) on a die and covering wire connection parts (70) and a side of another end of an insert while also covering the ground part (51) by means of injection molding. A secondary seal (200) is formed by means of the injection molding for coating a part formed with the primary seal for forming an external shape of a product.