The objective of this project for lactic acid bacteria that choose from sausage for make starter of sour pork by keep example in Kasetsart University then choose type bacteria from sausage use culture media De Man - Rogosa-Sharoe agar (MRS) add bromocresol purple and CaCO3, Choose special colony that diversify indicator color from purple be yellow, Can choose 7 isolates. When research morphology and biochemisty reaction for differentiate of bacteria in the genus, found that the N1 N4 N5 andN7 is a bacterial genus Lactobacillus spp. and bacterial isolates. N2 N3 and N6 cannot identify the type. Then use the bacteria genus Lactobacillus spp. Isolates and to make N1 N4 N5 N7 inoculum. The results showed that the bacteria isolate N1 N4 N5 and N7 can as starter culture. But the bacteria isolate N2 N3 and N6 cannot be used as starter culture. The changes between ferment sour pork, found that pH starting at age of 0 hours in all preview of 6.0 then pH decreased at 5.7 - 5.0 fermentation 12-24 hours. Then pH drop until at 4.5 fermentation 48 hours in all the examples, which pH finally the chemical quality of sour pork said. pH of product is less than or equal to 4.6 this study pH at the end is 4.5