To evaluate the effects of silicic acid powder containing bamboo vinegar liquid (SPV) on growth performance, carcass traits and intestinal histology, 80 male broilers at 7 days of age were divided into four treatment groups, each with four replicates of five chickens. The birds were fed ad libitum a basal diet supplemented with SPV at a level of 0%, 0.1%, 0.2% or 0.3% until 49 days of age. Body weight gain was the highest in chickens fed the 0.2% SPV diet. The dietary treatments had no significant effects on performance or carcass traits. Tissue observations by light microscopy revealed that villus height and villus areas of the duodenum and jejunum were comparatively higher in the 0.2% SPV group. Duodenal and jejunal cell mitosis were also increased by this diet. These results indicate that dietary SPV at 0.2% could stimulate intestinal functions in broiler chickens.