To present not only a spot of method calling accompanied by a fragile transition to a programmer, but also a spot of external input data and information of a method through which the data passes and a potential fragile spot by distinguishing it from the spot of the method calling.

An inspection method for fragileness of an application inspects the fragileness of a source code of an application to be inspected by distinguishing data from an outside of the source code for each input spot and by analyzing values to be referred by variables and a transition by a method. After acquiring a position of a code possible to have the fragileness, an input position of the data from the outside to be the cause of the fragileness and information of the method throughwich the data passes, the method determines whether or not the application to be inspected at the detected spot includes the fragileness by transmitting request data for inspection and by comparing its response data with a pre-registered fragileness determination code, and as a result, the method distinguishes the code with fragileness from that of without fragileness to output them.

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