To provide a filter medium that is small in pressure loss and has a deodorization function, and provide a filter element comprising the filter medium and a filter medium manufacturing method.SOLUTION: A filter medium of the present invention is provided in which the difference between the apparent density of a portion having the highest apparent density and the apparent density of a portion having the lowest apparent density in a cross section in the thickness direction of one fiber assembly A is 0.030 grams per cubic centimetre or more, and also a portion of low apparent density and a portion of high apparent density are present in the fiber assembly A. Accordingly, the filter medium that is small in pressure loss and has a deodorization function can be achieved because air is easy to pass in the portion of the low apparent density. Also, the filter medium of the present...

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