According to statistical data, the main cause of accidents is inappropriate behaviour of an employee. The analysis of causes of accidents determined that it is due to the low level of work safety culture. The main aim of the presented research was the assessment of the influence of selected sociodemographic factors on the level of safety climate in micro and small construction companies. The research was carried out by means of an authorial survey questionnaire on a group of 48 employees. Out of the mentioned factors, age and seniority have the biggest influence on the level of safety climate in the examined companies. The analysis shows that in the group consisting of the youngest employees and the group consisting of employees with the least seniority preventive measures should be taken in order to raise the level of work safety culture.