A blood plasma collecting flask consisting of plastic for storing blood plasma in a frozen state, comprising a flask body (1), which has a flask neck (2) on the upper face thereof, wherein connection points (7a, 7b) having connection pieces (8) are provided on the upper face of the flask body (1) on opposite sides of the flask neck (2) and laterally spaced apart from same, of which connection points one connection point (7a) is used to fill the flask body (1) with blood plasma and the other connection point (7b) is used for taking samples, and substantially L-shaped connectors (9) are provided at the connection points (7a, 7b), wherein each connector limb is connected to the connection piece (8) of the flask body (1) and the other connector limb points towards the flask neck (2) and bears a tube (10).