The purpose of this study is to construct fundamental information about the ultrasonographic diagnosis for extrinsic and intrinsic abdominal disease. Normal ultrasonography of liver, gall bladder, spleen, kidney, urinary bladder, stomach, pylorus, duodenum, and heart of 5 common marmoset(Callithrix jacchus) were determined by use of ultrasonography. One common marmoset was autopsied at the time of euthanasia which is performed 24 hours after ultrasonography, and above mentioned organs were measured actually. In ultrasonography of common marmoset, the gall bladder was 8.2 cm long, and 3.4 cm wide. The width of spleen was 4.3 mm. The right kidney was 22.2 mm long, 16.1 mm wide, and 9.3 deep. The ultrasonographic measurements of the left kidney in calves was similar. The urinary bladder was 8.6 mm long, and 5.0 mm wide.