This study evaluated the effect of latex content on the pullout behavior of macro synthetic fiber in hybrid fiber-reinforced latex-modified cement-based composites (HFLMCCs). A bond-strength test which utilized dog-bone-shaped test specimens was used to determine the pullout behavior. Micro jute fiber was incorporated at 9.00 kg/m3 and macro synthetic fiber at 0.45 kg/m3. Latex was added at 0, 5, 10, 15, 20, and 25% of the binder weight (wt %). Pullout tests showed that latex increased the area of the debonded zone of the pullout loaddisplacement curve. Bond strength increased with latex content up to 15% in HFLMCCs and decreased when the latex content reached 20%. The interface toughness increased until the latex content reached 20% and decreased when the latex content was 25%. These results were confirmed by microstructural analysis of the macro synthetic fiber surface, which showed that the number of scratches increased due to friction. (c) 2012 Wiley Periodicals, Inc. J. Appl. Polym. Sci, 2013