Overall sequence of a system designed using an object-oriented language is analyzed so as to permit easy comprehension. Class name acquisition means of a sequence analysis apparatus acquires class names included in sequence diagrams. Instance name acquisition means acquires instance names included in the sequence diagrams, and method name acquisition means acquires method names included in the sequence diagrams. Call relationship acquisition means acquires call relationships of methods included in the sequence diagrams. Sequence table display means looks up the thus-acquired class names, instance names, method names and call relationships, to generate and display a sequence table showing a tabulated list of the call relationships of the method.