An information reader of an injection container that includes a container clamping mechanism clamping side portions of the injection container, the container clamping mechanism includes a pair of first clamping bodies arranged on one side of the side portions of the injection container, and a second clamping body capable of entering between the pair of the first clamping bodies. Each of the pair of the first clamping bodies includes a first clamping unit having a first recess in an approximate doglegged shape, and a first arm portion projecting approximately horizontally from a lower end portion of the first clamping unit. The second clamping body includes a second clamping unit having a second recess in an approximately reverse doglegged shape formed to face against the first recess, and a second arm portion projecting approximately horizontally from a lower end portion of the second clamping unit.
