LH 4 or Laetoli Hominid 4[1] is the catalogue number of a fossilized mandible which was discovered by Mary Leakey in 1974 from Laetoli, Tanzania.

[2] Mary Leakey and her team, including Tim White,[3] found between 1974 and 1977 forty-two hominid teeth associated with a jawbone.

White described the fossils, and LH-4 was assigned as the "name-bearer" of the new species Australopithecus afarensis by Don Johanson and White.

[3] The specimen is 2.9–3.9 million years old and is mandible of an adult Australopithecus afarensis with all molars present and a fairly large canine.

But, the dental arcade is in a good condition with little or no evidence of distortion.