Patent ID: 8633409

Claim:
A waterproof structure of a wire leading portion comprising: a wire; a rubber cap assembled with the wire; a circuit board that is a connection destination of the wire; a housing accommodating the circuit board; a packing holder accommodated next to the circuit board through an opening of the housing; and a packing assembled on an outer periphery of the packing holder to be in close contact with an inner surface of the housing, wherein the packing holder includes: a rubber cap secession prevention wall that is a wall formed in a direction that crosses an accommodation direction; a wire insertion hole formed to penetrate the rubber cap secession prevention wall; and a rubber cap accommodation chamber communicating with the wire insertion hole and continuing to an inner surface of the rubber cap secession prevention wall, and wherein the inner surface of the rubber cap secession prevention wall and a cross-section of the circuit board are formed to hold the rubber cap that is accommodated in the rubber cap accommodation chamber.