Grundgesetz is a redirect to this article. For other basic laws, see the list of basic laws.

The Basic Law for the Federal Republic of Germany of 23 May 1949 (short German Basic Law; generally abbreviated GG, more rarely also GrundG) is the constitution of Germany.

The Parliamentary Council, which met in Bonn from September 1948 to June 1949, drafted and approved the Basic Law on behalf of the three Western occupying powers. It was adopted by all German state parliaments in the three western zones with the exception of Bavaria. There was therefore no referendum. This, and the fact that it was not called a "constitution", was intended to emphasise the provisional nature of the Basic Law and the Federal Republic of Germany that it established. The Parliamentary Council was of the opinion that the German Reich continued to exist and that a new constitution for the entire state could therefore only be adopted by all Germans or their elected representatives. However, because the Germans in the Soviet Occupation Zone (SBZ) and the Saarland were prevented from participating, a "Basic Law" was to be created for a transitional period as a "provisional partial constitution of West Germany": The original preamble emphasized the will of the German people for national and state unity. The Saarland became part of the Federal Republic on 1 January 1957 and thus came within the scope of the Basic Law. With the reunification of Germany on 3 October 1990, it became the constitution of the entire German people (→ Preamble).

The Basic Law fulfils the criteria of a substantive constitutional concept from the outset by making a basic decision on the form of the country's political existence: democracy, republic, welfare state, federal state and essential principles of the rule of law. In addition to these basic decisions, it regulates the organisation of the state, secures individual freedoms and establishes an objective order of values.

The fundamental rights enshrined in the Basic Law are of particular importance due to the experiences of the National Socialist unjust state. They bind all state authority as directly applicable law (Article 1.3). By their constitutive establishment, the fundamental rights are therefore not merely provisions on state objectives; rather, as a rule, no judicial authority is required to exercise them, and legislation, executive power and jurisdiction are bound by them. From this derives the principle that fundamental rights are to be understood primarily as defensive rights of the citizen against the state, while they also embody an objective order of values which applies as a basic constitutional decision to all areas of law. The social and political structure of the state-constituted society is thus determined by constitutional law.

The Federal Constitutional Court, as an independent constitutional body, preserves the function of the fundamental rights, the political and state organizational system and develops them further. The Basic Law for the Federal Republic of Germany in its present form establishes a perpetuated and legitimized state constitution. It can only be replaced by the people by adopting a new constitution (Art. 146).