An ear plug (1) for a hearing aid is made of a resilient material and provided with an extraction cord (4) for providing a grip by which a user can pull the ear plug (1) out of an ear canal. The extraction cord (4) is arranged partly in the resilient material and partly outside the ear plug. A securing bulge (6) is arranged on the part of the extraction cord arranged in the resilient material, in order to secure the position of the extraction cord in the resilient material. The extraction cord is bonded to the resilient material. The invention further concerns a method for manufacturing the ear plug.