图钉是一种以金属制成、下端尖锐、上部有明显圆盖的钉子；通常用来将文档固定在壁面(例如软木板)上；其上部圆盘的设计使得图钉非常容易插上及取下。

扁式图钉

最常见的图钉，是带有黄铜色扁头的扁式图钉，为了使其更引人注意，某些还改为塑胶制的彩色扁头。

美式图钉

美式图钉(map pins或pushpins)也是一种常见的图钉，此种图钉的上端有明显的把柄，这样的设计使其固定文档时把柄仍然是凸出的，容易快速地取下。另外由于明显易见的把柄，这种图钉常被特别用来标示地图上的特定地点。

A thumb tack (North American English) or push pin is a short nail or pin used to fasten items to a wall or board for display and intended to be inserted by hand, generally without the assistance of tools. A variety of names are used to refer to different designs intended for various purpose. Thumb tack and push pin are both sometimes compounded (thumbtack or pushpin) or hyphenated (thumb-tack or push-pin). Thumb tacks made of brass, tin or iron may be referred to as brass tacks, brass pins, tin tacks or iron tacks, respectively. These terms are particularly used in the idiomatic expression to come (or get) down to brass (or otherwise) tacks, meaning to consider basic facts of a situation. Drawing pin or drawing-pin refers to thumb tacks used to hold drawings on drawing boards. Map pin or map tack refers to thumb tacks used to mark locations on a map and to hold the map in place.