The objective of the present study was to evaluate the effect in piglets productive parameters of sodium heptanoate in a control diet without any additive. Forty-eight 21-d-old piglets (6.5 ± 0.5 kg) were randomly divided in 2 groups: control (C) and 98% Na-heptanoate (NaC7) 3 kg/t. Every treatment was replicated 6 times and each replicate consisted of 4 piglets. Mash feeds and water were offered ad libitum. BW, ADG, ADFI and FCR were recorded for every period. At the end of each period (35 d and 49 d), one piglet per replicate was euthanized and samples from the ileum and cecum were taken to analyze gut microflora. Besides, samples of duodenum, jejunum and ileum epitheliums were obtained to determine their development status. Data were analyzed as a completely randomized design by GLM of SPSS v. 19.0. Piglets receiving sodium heptanoate had higher final body weight without significative differences (16 Kg vs 16.2 Kg; P = 0.7583). However the use of NaC7 resulted in an improvement (P = 0.0431) in the FCR (1.416 vs 1.324) when compared with the control treatment. No significant differences were observed in count of Lactobacillus and E. coli. Neither were there significant differences in villi height; however, there was a tendency to show deeper crypts in duodenum (P = 0.1058) in the animals that received the sodium heptanoate (441.1 µm vs 374.3 µm). We can conclude that the use of sodium heptanoate is able to improve productive parameters in piglets compared with the control treatment.