To provide a medical liquid container which is free from sealing failure in the seal portion at the peripheral edge of the liquid medicament-housing chamber and also free from deterioration of a medicament housed in a small amount; and a preparation-containing medical liquid container. A secondary liquid medicament-housing chamber 12 is connected to one end of a primary liquid medicament-housing chamber 11. This secondary liquid medicament-housing chamber 12 is unseparably fixed to the primary liquid medicament-housing chamber 11 at a connection part 14. The secondary liquid medicament-housing chamber 12 has a bulge part 15 bulged such that the internal medicament-housing space before housing a second medicament is larger than the volume of the housed second medicament.