Arne Geijer (b. 7 May 1910, in Söderala, Söderhamn Municipality, Hälsingland, d. 27 January 1979 in Bromma, Stockholm) was a Swedish trade union organizer. He belonged to the Metalworkers' Union. Geijer was the chairman of the Swedish Trade Union Confederation 1956–1973. He was chairman of the Swedish National Pensioners' Organisation 1977–1979.