The present invention provides methods for extracting similar expression patterns and related biopolymers considering natures that are characteristic of expression data of, for example, genes. A segment of experiment cases which includes an expression of interest is selected as a search range among an expression pattern of a reference gene or the like. By comparing the selected segment of the expression pattern with expression patterns of a group of candidate genes or the like, genes having an expression pattern with at least a partial similarity are searched from the group of candidate genes. A partially taken out curve (a part of an, expression pattern) is transferred to overlap an expression pattern curve of a candidate gene to search expression patterns with a similar pattern shape.