UN Security Council Resolution 427
Location of the Blue Line
Date	3 May 1978
Meeting no.	2,076
Code	S/RES/427 (Document)
Subject	Israel-Lebanon
Voting summary	12 voted for None voted against 2 abstained
Result	Adopted
Security Council composition
Permanent members	China  France  United Kingdom  United States  Soviet Union
Non-permanent members	Bolivia  Canada  Czechoslovakia  Gabon  India  Kuwait  Mauritania  Nigeria  Venezuela  West Germany
← 426 Lists of resolutions 428 →

United Nations Security Council Resolution 427, adopted on May 3, 1978, after considering a letter by the Secretary-General, the council decided to increase the strength of the United Nations Interim Force in Lebanon (UNIFIL) from 4,000 to 6,000 troops.

While noting that some Israeli troops had withdrawn from Lebanon, it asked Israel to complete its withdrawal without further delay. The resolution went on to condemn all attacks by both parties on the UNIFIL peacekeeping force and demanded respect for the force. The decision came in the aftermath of the 1978 South Lebanon conflict during Lebanese Civil War.

The resolution was adopted by 12 votes to none; Czechoslovakia and the Soviet Union abstained while the People's Republic of China did not participate in voting.