障害厚生年金(その権利を取得した当時から引き続き障害等級の一級又は二級に該当しない程度の障害の状態にある受給権者に係るものを除く。以下この条、次条、第五十二条第四項、第五十二条の二及び第五十四条第二項ただし書において同じ。)の受給権者に対して更に障害厚生年金を支給すべき事由が生じたときは、前後の障害を併合した障害の程度による障害厚生年金を支給する。
If grounds have occurred based on which the beneficiary of an employees' disability pension (excluding the employees' disability pension of a beneficiary who has continuously had a disability of a degree of severity that is not classified as Grade 1 or Grade 2 of the disability grades from the time when the person acquired the right to receive benefits; the same applies hereinafter in this and the following Article, Article 52, paragraph (4), Article 52-2, and the proviso to Article 54, paragraph (2)) is to be paid further employees' disability pension, the employees' disability pension is paid in accordance with the severity of the beneficiary's disabilities stemming from a combination of the beneficiary's previous and subsequent disabilities.