The 1938 San Antonio pecan shellers strike was a labor strike involving 12,000 pecan shellers in San Antonio, Texas, United States. Considered the largest labor strike in San Antonio's history, it saw mainly Mexican American pecan shellers, organized by labor activist Emma Tenayuca, protest wage cuts by the Southern Pecan Shelling Company. Starting on January 31, the strike lasted until March 8, when the two sides agreed to arbitration that led to a wage increase for the pecan shellers.