The positioning hinge has a pintle, a leaf assembly and a positioning element. The pintle is mounted in the leaf assembly and is connected with the positioning element. The leaf assembly has a surface, and the positioning element rubs against the positioning element to generate a growing friction. When the pintle and the leaf assembly are mounted to a cover and a body respectively, the growing friction generated by the positioning element and the leaf assembly makes the cover to be positioned at a desired position relative to the body.