PROBLEM TO BE SOLVED: To provide a bath agent mixing device that can be used with shower equipment and realizing a convenient form of health bath.SOLUTION: The bath agent mixing device comprises: a housing 2 including a bath agent mixing cavity 3 in the inside; a water inlet provided on the housing and communicating with the bath agent mixing cavity; a bath agent charging hole provided on the housing and communicating with the bath agent mixing cavity; a water outlet provided on the housing; and a negative pressure pipe 7 that is disposed in the housing, one end of which extends to a lower portion in the bath agent mixing cavity and the other end of which communicates with the water outlet. The operation state of the bath agent mixing device includes a water storage state and a water delivery state. When the bath agent mixing device is in the water storage state, the water inlet is opened and the water outlet is closed. When the bath agent mixing device is in the water delivery state, the water inlet is closed and the water outlet is opened. The present invention can be used with shower equipment.SELECTED DRAWING: Figure 1COPYRIGHT: (C)2020,JPO&INPIT【課題】シャワー設備と共に使用され得、便利な保健浴の形式を実現する入浴剤混成器を提供する。【解決手段】入浴剤混成器は、内部に入浴剤混合キャビティ3が設けられたハウジング2と、ハウジング上に設けられ、入浴剤混合キャビティと連通している入水口と、ハウジング上に設けられ、入浴剤混合キャビティと連通している入浴剤装入口と、ハウジング上に設けられた出水口と、ハウジング内に配置され、一端が入浴剤混合キャビティ内の下部まで延在し、他端が出水口と連通している負圧配管7とを備えている。入浴剤混成器の作動状態は、貯水状態及び送水状態を含む。入浴剤混成器が貯水状態のときには、入水口が開き、出水口が閉じる。入浴剤混成器が送水状態のときには、入水口が閉じ、出水口が開く。本発明は、シャワー設備と共に使用され得る。【選択図】図1