Guttural speech sounds are those with a primary place of articulation near the back of the oral cavity, especially where it is difficult to distinguish a sound's place of articulation and its phonation. In popular usage it is an imprecise term for sounds produced relatively far back in the vocal tract, such as German ch or the Arabic ayin, but not simple glottal sounds like h. The term 'guttural language' is used for languages that have such sounds.

As a technical term used by phoneticians and phonologists, guttural has had various definitions. The concept always includes pharyngeal consonants, but may include velar, uvular or laryngeal consonants as well. Guttural sounds are typically consonants, but murmured, pharyngealized, glottalized and strident vowels may be also considered guttural in nature. Some phonologists argue that all post-velar sounds constitute a natural class.