Telescopic boom lift is used for work (mounting, repairs, maintenance, etc. ) that needs to be performed at height. In this thesis, the device is intended for a single worker with a supporting tool. Vertical and horizontal displacements are enabled by hydraulic cylinders and rotation around the vertical axis is motor driven. At the beginning of this paper types of telescopic boom lifts for different uses are shown. Next, an overview of the working principle is given as well as suggestions of different solutions for each function. Using the solutions presented in the morphological matrix, an optimal variant is chosen and further elaborated. Structural calculations are devided into four parts: basket, basket and telescope coupling, telescope and base. Critical joints (load-bearing structure, welds, shafts, pins), guiding elements (bearings, roller bearings) and drive members (hydraulic cylinders, motor) are calculated and checked if they conform to the exploatation requirements. The solution is designed in Solidworks where the main assembly drawing was made, followed by an assembly drawing of basket, telescope and base.