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Heritability and genetic advance were estimated in four F2 mungbean populations (Ramzan×ML-5, NM- 92×NM-1919, NM-1919×ML-5 and ML-5×NM-51) at two locations (Peshawar and Swat) of Khyber Pakhtunkhwa province, Pakistan, during 2008. Combined analysis exhibited highly significant differences among the genotypes and locations for pods plant-1, pod length, seeds pod-1, 1000-seed weight and seed yield. Similarly, genotype-by-location interaction was highly significant for pods plant-1 and 1000-seed weight. Averaged over five parents and four F2 populations, means for clusters plant-1, pods plant-1, pod length, seeds pod-1, 1000-seed weight and seed yield plant-1 at Peshawar and Swat were 9.2 vs. 9.8, 28.7 vs. 35.3, 8.5 vs. 8.7 cm, 9.3 vs. 10.0, 50.4 vs. 56.5 g and 7.1 vs. 7.6 g, respectively. Broad-sense heritability estimates in four F2 population of mungbean ranged from 0.22 to 0.70 and 0.34 to 0.58 for clusters plant-1, 0.33 to 0.75 and 0.19 to 0.61 for pods plant-1, 0.19 to 0.74 and 0.45 to 0.68 for pod length, 0.21 to 0.58 and 0.48 to 0.66 for seeds pod-1, 0.34 to 0.63 and 0.58 to 0.89 for 1000-seed weight and 0.15 to 0.64 and 0.45 to 0.61 for seed yield at Peshawar and Swat, respectively. Genetic advance was greater at Swat than at Peshawar. Among the four F2 populations, genetic improvement of yield-associated traits will be more effective in Ramzan×ML-5 and ML-5×NM-51. Moreover, among the parents, ML-5 showed good combination with Ramzan and NM-51.Key words: Heritability, harvest traits, F2 populations, mungbean.