The men's 4 × 100 metres relay event at the 1955 Pan American Games was held at the Estadio Universitario in Mexico City on 19 March.Full results

Results Rank Nation Athletes Time Notes Willie Williams, John Bennett, Charles Thomas, Rod Richard 40.96 GR Clive Bonas, Apolinar Solórzano, Guillermo Gutiérrez, Juan Leiva 41.36 Alberto Goya, René Ahumada, Javier Souza, Sergio Higuera 41.94 4 Enrique Beckles, Raúl Zabala, Gerardo Bönnhoff, Eduardo Basilio Ríos 42.12 5 Bruce Springbett, Dick Harding, Jack Smyth, Harry Nelson 42.24 6 Luis Soriano, Rafael Castro, Eligio Rivas, Domingo García 42.64 7 Evaristo Iglesias, Angel García, Evelio Planas, Rafael Fortún

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