A speaker module, used for a headset, wherein the headset comprises a housing, and the speaker module comprises: a first speaker unit, wherein the first speaker unit comprises a first diaphragm assembly (4a21), and an outer surface of the first diaphragm assembly (4a21) faces a first side; and a second speaker unit, wherein the second speaker unit is located on one side of a circumferential direction of the first speaker unit, the second speaker unit emits sound toward the first side, and frequency range of the second speaker unit is higher than frequency range of the first speaker unit; wherein an outer circumferential surface of the first speaker unit comprises a first contour surface and a second contour surface, and the first contour surface and the second contour surface are arranged and connected along the circumferential direction of the first speaker unit; an inner circumferential surface of the housing comprises a first inner circumferential surface region and a second inner circumferential surface region, and the first inner circumferential surface region and the second inner circumferential surface region are arranged and connected along a circumferential direction of the housing; the first contour surface is opposite to and spaced apart from the first inner circumferential surface region, the second contour surface is adapted to the second inner circumferential surface region, and the second speaker unit is located between the first contour surface and the first inner circumferential surface region; the first speaker unit comprises a first frame (4a24), the first diaphragm assembly (4a21) is supported on the first frame (4a24) and coaxially disposed based on a same central axis as the first frame (4a24), a circumferential wall of the first frame (4a24) comprises a first part and a second part, the first part and the second part are arranged and connected along a circumferential direction of the first frame (4a24), a surface that is of the first part and that faces away from the second part is formed as the first contour surface, and a surface that is of the second part and that faces away from the first part is formed as the second contour surface; and an annular groove (4a2413) recessed in a direction away from the central axis of the first frame (4a24) is disposed on an inner circumferential surface of the first frame (4a24), the annular groove (4a2413) extends along the circumferential direction of the first frame (4a24) and the annular groove (4a2413) penetrates to an end surface of an open end of the first frame (4a24), and an outer edge of the first diaphragm assembly (4a21) is accommodated in the annular groove (4a2413) and fastened to a bottom surface of the annular groove (4a2413). a first speaker unit, wherein the first speaker unit comprises a first diaphragm assembly (4a21), and an outer surface of the first diaphragm assembly (4a21) faces a first side; and a second speaker unit, wherein the second speaker unit is located on one side of a circumferential direction of the first speaker unit, the second speaker unit emits sound toward the first side, and frequency range of the second speaker unit is higher than frequency range of the first speaker unit; wherein an outer circumferential surface of the first speaker unit comprises a first contour surface and a second contour surface, and the first contour surface and the second contour surface are arranged and connected along the circumferential direction of the first speaker unit; an inner circumferential surface of the housing comprises a first inner circumferential surface region and a second inner circumferential surface region, and the first inner circumferential surface region and the second inner circumferential surface region are arranged and connected along a circumferential direction of the housing; the first contour surface is opposite to and spaced apart from the first inner circumferential surface region, the second contour surface is adapted to the second inner circumferential surface region, and the second speaker unit is located between the first contour surface and the first inner circumferential surface region; the first speaker unit comprises a first frame (4a24), the first diaphragm assembly (4a21) is supported on the first frame (4a24) and coaxially disposed based on a same central axis as the first frame (4a24), a circumferential wall of the first frame (4a24) comprises a first part and a second part, the first part and the second part are arranged and connected along a circumferential direction of the first frame (4a24), a surface that is of the first part and that faces away from the second part is formed as the first contour surface, and a surface that is of the second part and that faces away from the first part is formed as the second contour surface; and an annular groove (4a2413) recessed in a direction away from the central axis of the first frame (4a24) is disposed on an inner circumferential surface of the first frame (4a24), the annular groove (4a2413) extends along the circumferential direction of the first frame (4a24) and the annular groove (4a2413) penetrates to an end surface of an open end of the first frame (4a24), and an outer edge of the first diaphragm assembly (4a21) is accommodated in the annular groove (4a2413) and fastened to a bottom surface of the annular groove (4a2413).