PROBLEM TO BE SOLVED: To provide a bath agent having excellent warm bath effect and stable quality.SOLUTION: A bath agent has a composition comprising, by a weight ratio in terms of the total amount, magnesium sulfate heptahydrate: 87.05%, magnesium sulfate trihydrate: 10.0%, β-cyclodextrin: 1.0%, flavor: 1.0%, calcium silicate: 0.50%, sodium sulfate: 0.27%, phenoxy ethanol: 0.12%, and dye: 0.06%.SELECTED DRAWING: None