<；P>；PROBLEM TO BE SOLVED: To provide a mixing injector which mixes accurately and selectively infusion fluids to be mixed at any mixing ratio and which makes it possible to carry fluids to be injected in a capsule and to form a set with a container to be injected. <；P>；SOLUTION: A plurality of injection containers 6A, 7A, 6B, 7B each enclosing different types of infusion fluids 12A, 12B are arranged side by side and individually operably in an injection container main body 2. An injection amount detection means 15 for detecting the injection amount of each container is provided, and thus the containers are arranged small in size and not only the mixing ratio relative to a fluid to be injected but also a mixing ratio between the fluids 12A, 12B to be mixed can be controlled, grasping accurately each injection amount. As a result, it is applicable for mixing an additive relative to a beverage fluid body according to preference and also for a mixing requiring an accurate mixing ratio such as the preparation of medical supplies. <；P>；COPYRIGHT: (C)2007,JPO&INPIT
