A liner material supply apparatus by which the weight ratio between a first feedstock liquid and a second feedstock liquid to be fed to static mixers (40, 42) is maintained sufficiently precisely. A heater for bring the temperature of the first feedstock liquid, which is fed from a first accommodation tank (26) to the static mixers through a first feeding pump (22), and the temperature of the second feedstock liquid, which is fed from a second accommodation tank (28) to the static mixers through a second feeding pump (24), to predetermined temperatures are annexed, at least, to the first feeding pump and the second feeding pump. Liner material acceptance unit (10) is disposed which is selectively located at an operating position where the liner material acceptance unit accepts a liner material discharged from discharge unit (18), and a non-operating position where the liner material acceptance unit does not interfere with the liner material discharged from the discharge unit.