These mice express cre recombinase from the Ptf1a locus. By mating the reporter mice with CreERT2-expressing mice, reporter gene expression can be detected in the pancreatic acinar cells of the Ptf1aCreERT2/+ ; Rosa26tdTomato/+ mouse. And the mice are useful for generating conditional mutations in pancreatic acinar cells. This strain may be useful for in the research of pancreatic cancer.