The present invention relates to an earbud set, and a hearing aid and an earphone using the same, and Bluetooth, the ear bud set comprising: a body part; a leg part foldably connected to the body part; and an elastic body connected to the body part and a foldable portion of the leg part. The earbud set according to the present invention is stably provided in the ears when being used for the hearing aid or the earphone, the Bluetooth and the like, and thus is not easily separated from the ears despite vigorous motion, and since earholes are ventilated after being provided in the ears and external sound can be heard after being worn in the ears, sound transmission efficiency capable of preventing a safety accident is effective. In addition, the earbud set according to the present invention can be stably worn in the ears irrespective of the different shapes and sizes of ears of people, does not cause earaches by dispersing the force applied to the ears, and can be stably provided to the ears with low pressure.