基督少年军（英语：The Boys' Brigade)是一个基督教青少年制服团体，在世界各地都设有分支。

于青少年人之间，扩展基督的国度，同时促进服从、虔诚、纪律及自爱等良好行为，以达成基督化的人格。

For the 80s New Wave band from Canada, see Boys Brigade (band). Not to be confused with the Church Lads' and Church Girls' Brigade.

The Boys' Brigade (BB) is an interdenominational Christian youth organisation, conceived by Sir William Alexander Smith to combine drill and fun activities with Christian values. Following its inception in Glasgow in 1883, the BB quickly spread across the United Kingdom and became a worldwide organisation by the early 1890s. As of 2003, there were 500,000 Boys' Brigade members in 60 countries.