头状骨（capitate bone）是人类掌骨中最大的一块，为腕骨中央的骨头。较圆的一端位于手舟骨及月骨所组成的凹槽上。
许多哺乳类动物身上也可以找到这块骨头，与爬虫类及两栖类身上的第三远端腕骨为同源构造。
头状骨是腕骨中最大的一块，位于腕骨远端列。头状骨的旁边接的是无名指掌骨，，尺骨侧连接的是钩骨，桡侧连接三角骨，腕侧结月骨跟手舟骨。:708–709
The is round, smooth, and articulates with the lunate bone.
The is divided by two ridges into three facets, for articulation with the second, third, and fourth metacarpal bones, that for the third being the largest.
The is broad and rough.
The is narrow, rounded, and rough, for the attachment of ligaments and a part of the adductor pollicis muscle.
The articulates with the lesser multangular by a small facet at its anterior inferior angle, behind which is a rough depression for the attachment of an interosseous ligament. Above this is a deep, rough groove, forming part of the neck, and serving for the attachment of ligaments; it is bounded superiorly by a smooth, convex surface, for articulation with the scaphoid bone.
The articulates with the hamate bone by a smooth, concave, oblong facet, which occupies its posterior and superior parts; it is rough in front, for the attachment of an interosseous ligament.
The capitate bone variably articulates with the metacarpal of the index finger.
头状骨的骨化始于1至5个月大时。
为构成腕骨的一部分。:708
辞源来自于拉丁文的“头”（）。
左手头状骨示意图（红色部分）
左手头状骨近观图（红色部分）
左手头状骨，尺骨面观（小指面观）
左手头状骨，桡骨面观（大拇指面）
Right hand posterior view (dorsal view). Thumb on bottom.
Right hand anterior view (palmar view). Thumb on top.
Capitate bone shown in yellow. Left hand. Palmar surface.
Capitate bone shown in yellow. Left hand. Dorsal surface.
Transverse section across the wrist (palm on top, thumb on left). Capitate bone shown in yellow.
Cross section of wrist (thumb on left). Capitate shown in red.
本条目使用了部分解剖术语，概述请参阅这里（英语：anatomical terminology）。
本条目包含来自属于公共领域版本的《格雷氏解剖学》之内容，而其中有些资讯可能已经过时。
