A particle analyzer, comprising: characteristic information obtaining means adapted to obtain a plurality of characteristic information of each of particles contained in a sample by measuring a measurement sample prepared from the sample; particle number obtaining means adapted to obtain a particle number of a specific kind of particles contained in the sample and each particle number of a plural kinds of particles contained in the sample, the plural kinds of particles being different from the specific kind of particles, based on information obtained by the characteristic information obtaining means, wherein the specific kind of particles are nucleated red blood cells, and the plural kinds of particles are lymphocytes and neutrophilic leucocytes, the particle analyser characterized by comprising: target particle determining means adapted to determine a target kind of particles, whose particle number is to be corrected, from the plural kinds of particles, based on information obtained by the characteristic information obtaining means; and correcting means adapted to correct a particle number of the target kind of particles obtained by the particle number obtaining means, by subtracting the particle number of the specific kind of particles from the particle number of the target kind of particles obtained by the particle number obtaining means. characteristic information obtaining means adapted to obtain a plurality of characteristic information of each of particles contained in a sample by measuring a measurement sample prepared from the sample; particle number obtaining means adapted to obtain a particle number of a specific kind of particles contained in the sample and each particle number of a plural kinds of particles contained in the sample, the plural kinds of particles being different from the specific kind of particles, based on information obtained by the characteristic information obtaining means, wherein the specific kind of particles are nucleated red blood cells, and the plural kinds of particles are lymphocytes and neutrophilic leucocytes, the particle analyser characterized by comprising: target particle determining means adapted to determine a target kind of particles, whose particle number is to be corrected, from the plural kinds of particles, based on information obtained by the characteristic information obtaining means; and correcting means adapted to correct a particle number of the target kind of particles obtained by the particle number obtaining means, by subtracting the particle number of the specific kind of particles from the particle number of the target kind of particles obtained by the particle number obtaining means. target particle determining means adapted to determine a target kind of particles, whose particle number is to be corrected, from the plural kinds of particles, based on information obtained by the characteristic information obtaining means; and correcting means adapted to correct a particle number of the target kind of particles obtained by the particle number obtaining means, by subtracting the particle number of the specific kind of particles from the particle number of the target kind of particles obtained by the particle number obtaining means.