Julio Argentino Pascual Roca Funes (17 May 1873 – 8 October 1942) was an Argentine politician and diplomat.

He was born to Clara Funes and General Julio Roca, who would become President of Argentina and dominate national politics for a generation after 1880.

His tenure as Vice President was remembered mainly for his being the co-author of the Roca-Runciman Treaty, signed with Great Britain in February 1933 in order to strengthen the commercial and financial ties between the two countries.

Justo's successor, Roberto María Ortiz, appointed Roca Ambassador to Brazil in 1938, and he was named Minister of Foreign Relations in 1940.

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