Ergonomics plays an important role in shaping safe and hygienic working conditions. Its main purpose is to increase the productivity of work in a way to not cause adverse health effects for the employee. In the article the profession of excavator operator, taking into account the scope of activities performed the qualifications and skills necessary to perform this profession were described. In the further part of the work, hazards occurring in the working environment of the excavator operator were identified. Then, selected ergonomic factors influencing the comfort of earthmoving machine operator were analyzed, in particular those that could cause excessive strain on the musculoskeletal system. Authors of the work focused primarily on discussing the construction and equipment of the excavator cabin as those elements that fundamentally determine the safe, ergonomic and comfortable work. The measurable effect of the work is to propose preventive works reducing the negative impact of these factors on the human body.