To provide means for improving underwater collapsibility of a solid cleaning composition containing an oxygen bleaching agent and with a relatively high pH.SOLUTION: A cleaning set has a solid cleaning composition that contains an oxygen bleaching agent, with its pH having the neutral value or higher when dissolved in water, and an ultrasonic cleaner.SELECTED DRAWING: None【課題】本発明は、酸素系漂白剤を含み、pHが比較的高い固形洗浄用組成物の水中での崩壊性を改善する手段を提供することを目的とする。【解決手段】酸素系漂白剤を含み且つ水に溶解させた際のpHが中性以上となる固形洗浄用組成物と超音波洗浄器とを含む、洗浄セット。【選択図】なし