A reagent container for use with a blood cell counting analyzer which is configured to use multiple types of staining reagents for blood testing, the blood cell counting analyzer comprising a housing including (A) a plurality of slots each defining a receiving space to individually accommodate the reagent container and (B) a plurality of aspiration tubes arranged respectively for the slots, wherein the aspiration tubes are arranged to be vertically movable such that each aspiration tube is inserted into the reagent container, the reagent container comprising:
- a storage bag that stores one of the multiple types of staining reagents to prepare a measurement sample, wherein a usage frequency of the staining reagent stored in the storage bag differs from that of the other types of the staining reagents;
- and
- a frame supporting an upper part of the storage bag and hanging the storage bag therefrom, wherein the frame is formed to have an elongated shape in a longitudinal axis, wherein the frame is configured to be inserted, along the longitudinal axis, into one of the slots, wherein
- the frame comprises:
- (i) an opening portion provided at a first position of the frame, the opening portion allowing the aspiration tube to enter an interior of the storage bag;
- (ii) a grip formed at a second position of the frame, wherein the first position and the second position are different each other;
- (iii) a guide portion configured to interact with an inner structure of the slot, wherein the guide portion is supported by the inner structure while the frame is inserted into the slot;
- and
- (iv) an engaging portion configured to mechanically engage with an engaging mechanism which is provided inside of the slot, wherein, by engaging the engaging portion with the engaging mechanism, the opening portion is aligned at a position below the aspiration tube,
- wherein the grip of the frame inserted into the slot is positioned away from the aspiration tube provided inside of the slot.