{{Muscle infobox |
  Name         =  |
  Latin        = musculus semispinalis cervicis |
  GraySubject  = 115 |
  GrayPage     = 400 |
  Image        = Gray384.png |
  Caption      = Section of the neck at about the level of the sixth cervical vertebra. Showing the arrangement of the fascia coli. (Semispinalis colli visible at bottom right.) |
  Image2       = Semispinalis.png |
  Caption2     = Deep muscles of the back. (Semispinalis cervicis visible at top center left.) |
  Origin       = transverse processes of the upper five or six thoracic vertebræ|
  Insertion    = cervical spinous processes, from the axis to the fifth|
  Action       = |
  Blood        = |
  Nerve        = |
  MeshName     = |
  MeshNumber   = |
  DorlandsPre  = m_22 |
  DorlandsSuf  = 12550711  |
}}
The '''semispinalis cervicis''' ('''semispinalis colli'''), thicker than the semispinalis dorsi, arises by a series of tendinous and fleshy fibers from the transverse processes of the upper five or six thoracic vertebræ, and is inserted into the cervical spinous processes, from the axis to the fifth inclusive. 

The fasciculus connected with the axis is the largest, and is chiefly muscular in structure.

<table border="1" cellspacing="0" align="right" cellpading="0">
<tr><th bgcolor=pink>半棘筋(群)</th></tr>

<tr><th align="center" bgcolor=pink>分類</th></tr>
<tr><td>
<table align="center">
<tr><td>所在分類: </td><td>骨格筋 </td></tr>
<tr><td>支配神経: </td><td>脊髄神経</td></tr>
<tr><td> </td><td> </td></tr>
</table></td></tr>
<tr><th align="center" bgcolor=pink>部位</th></tr>
<tr><td>
<table align="center">
<tr><td>体幹筋 </td></tr>
<tr><td>背部の筋 </td></tr>
<tr><td>棘背筋 </td></tr>
<tr><td>長背筋 </td></tr>
<tr><td>横突棘筋 </td></tr>
</table></td></tr>
<tr><td align="center" bgcolor=pink>ラテン名</td></tr>
<tr><td align="center">musculus semispinalis</td></tr>
<tr><td align="center" bgcolor=pink>英名</td></tr>
<tr><td align="center">Semispinalis</td></tr>
</table>

'''半棘筋'''（'''はんきょくきん'''）は、横突棘筋のうち、最も上側に位置する筋肉である。

半棘筋は、更に'''頸半棘筋''' (musculus semispinalis cervicis)、'''頭半棘筋''' (musculus semispinalis capitis)、'''胸半棘筋''' (musculus semispinalis thoracis)の、3筋に分類される。