An in-ear earphone includes an earphone housing, a speaker assembly fixed onto the earphone housing, and an electric energy portion electrically connected to the speaker assembly, a sound emitting tube and an ear tip, where one end of the sound emitting tube is fixed onto the earphone housing, where the sound emitting tube has a first through hole; and the ear tip is fixedly connected to the other end of the sound emitting tube, a cross-section of the ear tip is oval-shaped, the ear tip has a first end and a second end that face to each other, the ear tip has a stepped hole penetrating through the first end and the second end, a part of the sound emitting tube is located in a large-diameter section of the stepped hole, and a small-diameter section of the stepped hole is in communication with the first through hole.