The following thesis deals with the implementation of Augmented Reality (AR) technology on manual assembly workstation. In the theoretical part of our work we presented the basics of manual assembly in regard to Industry 4.0 principles. We reviewed the AR technology in detail and described basics of its operation. In the practical part of our work, we developed an AR user interface in the Unity game engine, for use with Meta 2 AR glasses, for the purpose of showing assembly instructions on manual assembly workstation. The goal of this thesis was to get to know uses of AR technology on manual assembly workstation.