A Tam o'shanter is a Scottish bonnet worn by men which was named after a character invented by Robert Burns. The bonnet is made of wool with a toorie (pompom) in the centre, and the crown is about twice the diameter of the head. It might be available in plain colours or in different tartans.

Tam o'shanters are worn by the Scottish infantry regiments of the British Army instead of berets. They are plain khaki in colour and are stiffer than civilian tam o'shanters, with a narrower, flat crown often worn sloping down from back to front.