脾细胞（英语：splenocyte）是在脾脏中的单核球，是免疫系统的一员。单核球是五种主要的白血球之一。

（注：Splenocyte照字面翻译为「脾细胞」，但不建议翻成中文。）

A splenocyte can be any one of the different white blood cell types as long as it is situated in the spleen or purified from splenic tissue.

It sometimes explicitly refers to monocytes or macrophages.

Splenocytes consist of a variety of cell populations such as T and B lymphocytes, dendritic cells and macrophages, which have different immune functions.