BACKGROUND & SIGNIFICANCE Latino men are just as likely to smoke as non-Hispanic White men; [CDC, 2004] however, few smoking cessation programs have shown long term effects among Latinos. Further, many Latinos cannot enter traditional smoking cessation programs because they do not speak English. To be effective, programs should capitalize on a "teachable moment". [McBride, 2003] Pregnancy has been shown to be a teachable moment for women to quit smoking; whether it is a teachable moment for partners has not been explored. Including Latinas and intervening with the couple might help sustain cessation effects long term. The aim of this randomized controlled trial is to compare a culturally tailored intervention to a minimal intervention (self-help smoking cessation guides or Guia) in promoting and sustaining smoking cessation among expectant Latino fathers during pregnancy and postpartum.