Trade Union are a major component of the modern INDUSTRIAL RELATION system. Indian Trade Union Act 1926,defines Trade Union as any combination,wether temporary or permanent, formal primarily for the purpose of regulating the relations b/w workmen & workmen or workmen & employers or employers & employers. Trade Union are a natural growth in an industrial Society. In the words of Dale Yoder,” Trade Union is a continuing long term association of employees formed and maintained for the specific purpose of advancing & protecting the interests of members in their working relationships.” It gives the feel ,the heat of being united. Trade Union came into being for a variety of purposes. IMPORTANCE OF TRADE UNOIN: Workers need steady employment. Workers want to be heard by the management. Workers want to protect themselves from economic hazards beyond their control. Workers believes in rationalization of policies. Workers also want gaining legislative enactments. PROBLEMS OF TRADE UNION:- Uneven Growth. Low Membership. Multiplicity of union. Inter union rivalry. Absence of paid office bearers. Weak financial position. Lack of interest. Lack of unity of trade union. Outside leadership. FUNCTION OF TRADE UNION: To acquire control over industry by workers. To achieve higher wages and better working condition & living for members. To raise the status of the workers as partners in industry(T.U). To generate self-confidence among the workers. To secure fair wages for workers. To safeguard the security of tenure & improve service condition. To provide for education ,cultural & recreational facilities. To protect individual & collective welfare.