In temperament the Affenpinscher is alert, self-assured and often clownish. It is devoted to its household but can be stubborn, and it will stand up to much larger dogs without hesitation. Though usually quiet, it can become very excited when threatened.
This is a compact, square-built little dog with a domed head, a short muzzle, round dark eyes and a slightly undershot jaw. Its coat is rough and wiry, shorter and denser on the body and longer and shaggier on the head, where it forms bushy eyebrows, a beard and a loose mane. Black is the usual colour, but grey, silver, red, black and tan, and belge, a mix of black, brown, red and white hairs, are also seen.
The Affenpinscher takes its name from the German for monkey pinscher, and in France it is known as the little moustached devil. Its numbers fell sharply during the Second World War and the breed became rare for a time. It is widely believed to have played a part in creating the Brussels Griffon. It was bred to work as a ratter, keeping mice and rats out of stables, kitchens and granaries, before it settled into life as a companion.