This paper explores the obligatory and optional content of the employment contract. The minimum content of the employment contract is prescribed by the Labor Law. Each employment contract must contain the data prescribed for the minimum content of the employment contract. In special cases the employment contract must contain some additional directives. The Labor Law prescribes an additional minimum content of employment contracts when concluding employment contracts for permanent seasonal jobs, when sending workers abroad, at separate working places, when working in a temporary employment agency, on probationary work, and on internships. In addition to the mandatory content, the employment contract may also contain additional, optional clauses by which the employer and the employee, within the permitted regulations, agree on other rights and obligations arising from their employment.