Price changes of eastern little tuna in PPN Pekalongan and PPS Nizam Zachman Jakarta significant can be an attraction fish trader /fisherman in PPN Pekalongan to sell eastern little tuna to PPS Nizam Zachman Jakarta. This phenomenon is quite interesting to examine correlation and integration market of eastern little tuna in both locations. The integration of markets can be calculated from the Index of Market Connection (IMC). The study relied on data weekly from bulletin ‘warta pasar ikan' in August-September 2010. The result of the model test obtained -with assumption that the deciding factor is the price cateris paribus- that is if there is an increase of eastern little tuna prices in PPN Pekalongan last week Rp.100/kg, it will lower the eastern little tuna price in PPS Jakarta this week about Rp. 48.4 / kg. And if there is an increase of eastern little tuna prices in PPN Jakarta last week Rp.100/kg, it will lower the eastern little tuna price in PPS Pekalongan this week about Rp. 51.7 / kg. This research shows that the market integration of eastern little tuna price in long term between PPS Jakarta with PPN pekalongan is relatively high with IMC value 0,936.