The paper presents the results of the study of the influence of leadership dimensions, (transformational, transactional, LMX and ethical leadership) on individual entrepreneurial orientation dimensions, the achievement dimension and the theory of planned behaviour dimensions. The respondents were employed persons in organizations in Serbia (540 respondents). Under favourable conditions (good strategic management and intellectual stimulation), entrepreneurial intentions tend to decline, while under unfavourable conditions (expectation of high performance with punishment as motivation), entrepreneurial intentions tend to increase. The leader's unethical behaviour can lead to great dissatisfaction among employees, who then begin to form entrepreneurial intentions, even if they do not have such a positive opinion of entrepreneurial ventures. A general model, of the impact of the observed leadership dimensions on two particularly significant entrepreneurial dimensions: Personal Attitude and Entrepreneurial Intentions, is formatted, as well as a model of those influences in the case of the moderating effect of the respondents' perceived performance at work.