Purpose: The purpose of this paper is to identify the determinants of behaviour of drivers with regard to the possession and use of cars and their approach to the alternative which allows to rent cars in the market today – the so-called car sharing service, which is becoming increasingly popular and consists in using a vehicle without having to own it. Design/methodology/approach: For the purposes of this article a survey was conducted among current and potential users of the car sharing service. The purpose of this publication was also to gain knowledge on the market's needs in terms of mobility and consumer perception of the services of car rental companies. Findings: According to the respondents' opinion, factors affecting the decision to use the car sharing service were verified in the surveys. Attention was paid to such issues as the availability of parking spaces for cars in the car sharing service, the price of this service and a modern fleet of vehicles made available in the service. Research limitations/implications: It is advisable to carry out further scientific research in the field of the use of car sharing services due to the fact that it is an increasingly popular way of communication, mainly among the inhabitants of urban agglomerations. Practical and social implications: The approach to car ownership is changing. Young people are increasingly giving up car ownership and prefer its use. They do not have to pay for the purchase of the car, its operating costs, insurance or garage. The car sharing service is a convenient form of using a car without unnecessary expenses. Originality/value: The transport services market is constantly expanding, both in the field of the carriage of goods and passengers. The number of cars per capita increases year after year, which directly translates into increased number of cars on the roads in Poland and in the world. The problem is most evident in large city centres where car parks are overcrowded and urban infrastructure is unable to cope with the growing number of cars. This was the reason foraddressing the issue of changing the current model of passenger movement that could solve the problem of crowded cities.