1. A software test management program for causing a computer to manage information relating to a software test, the program comprising: a design model registration step that registers a design model including use cases; a source code registration step that registers a source code prepared on the basis of the design model; a test model registration step that registers the test cases prepared to correspond to the use cases in the design model and test data as test model and also the corresponding relationship between the design model and the test model; an execution trace registration step that registers the execution trace of each test case obtained by executing the source code according to the test cases in the test model, the corresponding relationship between the test model and the execution trace and also the corresponding relationship between the execution trace and the source code; and a model relations management step that traces the corresponding relationship among the design model, the test model, the execution trace and the source code on the basis of the corresponding relationship between the design model and the test model, the corresponding relationship between the test model and the execution trace and the corresponding relationship between the execution trace and the source code.