The thesis focuses on the applicability of a collaborative robot in assembly processes. The thesis presents the manual assembly process of headlights at a manual assembly station and assembly process in which a collaborative robot is involved. In order to successfully perform manual assembly in cooperation with a collaborative robot, it is necessary to determine which handling and assembly operations will be performed by the worker and which by the robot. It is necessary to rearrange the assembly station, make a new robotic gripper, program the appropriate operating cycle of the robot and analyse its operation in real environment. Since the chosen topic includes handling, assembly and usability of collaborative robots, the theoretical foundations are presented in the first part of the thesis. The following describes in more detail the already existing applications with collaborative robots, which appear in the industry in manual processes and represent the basis for determining suitable applications. The task also includes the design and construction of a robotic gripper and construction of new storage places and containers for parts. The most important part of the task is the development of a program for performing the robot cycle, and the experimental evaluation of assembly operations in terms of time analysis.