There is provided a process for preparing a fat and oil having a 1,3-disaturated long-chain fatty acid 2-monounsaturated long-chain fatty acid triglyceride (SUS)/1,2-disaturated long-chain fatty acid 3-monounsaturated long-chain fatty acid triglyceride (SSU) mass ratio of 9/1 or more, which comprises conducting transesterification of a fat and oil containing SUS of 50% by mass or more and SSU with an action of a 1,3-selective lipase selected from the group consisting of lipases derived from Thermomyces sp., Rhizopus oryzae and Rhizopus delemar . This process is an industrially suitable process for preparing a hard butter which has excellent properties as a cacao butter equivalent (CBE) or cacao butter improver (CBI).
