A liquid composition which comprises (a) a taxane based active ingredient selected from the group consisting of docetaxel and derivatives thereof (b) at least one glycol and (c) at least one surfactant ingredient selected from the group consisting of polysorbates polyoxyethylene glycol esters and polyoxyethylene castor oil derivatives wherein the volume ratio of the glycol (b) to the surfactant ingredient (c) is in the range of 45/55 to 55/45 and the total content of the glycol (b) and the surfactant ingredient (c) is 95 v/v% or higher relative to the whole volume of the liquid composition.
