LIQUID-PROOF STRUCTURE FOR WIRE HARNESS

There is provided a liquid-proof structure for a wire harness having a simple configuration and capable of suppressing the cost and reducing a size of a liquid-proof connector part. An outer periphery of a single core conductor (2) having a round rod shape and configuring an electric wire (1) is coated with an insulation film (4) such as enamel, except for a partial conductor exposed part (3) at an end portion of the single core conductor (2), an end portion of the single core conductor is inserted into a through-hole (7) of a seal member (6) made of an elastic material that is mounted to a waterproof casing with being closely contacted thereto, an inner periphery of the through-hole of the seal member is in close contact with an outer periphery of the coated insulation film (4), and a connection terminal (5) is provided to the partial conductor exposed part at the end portion of the single core conductor.