海陆空三军合作社（英语：Navy, Army and Air Force Institutes；简称NAAFI、英语发音：/ˈnæfiː/），是英国政府创建于1921年的一个单位，负责营运英军的康乐设施及供官兵、军眷消费的各种商店、营站，业务范围包括基地内的俱乐部、酒吧、超市、自助洗衣店、餐厅、咖啡店，以及英国皇家海军舰艇上的贩卖部。军官由于有专用食堂，除公事所需外不会进入三军合作社的俱乐部或酒吧。

在舰艇贩卖部工作的三军合作社人员归属海军消费合作社（Naval Canteen Service、NCS）管辖，尽管着海军制服，但身分上属于民间雇员。三军合作社人员可赴远征军合作社（Expeditionary Force Institutes、EFI，其工作人员隶属于后备部队性质的英国地方自卫队，除了着军装外亦有挂军阶）管理的战场流动营站工作，亦可加入皇家海军的派遣部队。

The Navy, Army and Air Force Institutes (NAAFI /ˈnæfiː/) is an organisation created by the British government in 1921 to run recreational establishments needed by the British Armed Forces, and to sell goods to servicemen and their families. It runs clubs, bars, shops, supermarkets, launderettes, restaurants, cafés and other facilities on most British military bases and also canteens on board Royal Navy ships. Commissioned officers are not usually supposed to use the NAAFI clubs and bars, since their messes provide these facilities and their entry, except on official business, is considered to be an intrusion into junior ranks' private lives.