An analysis device comprising: a reagent container holding portion for holding a reagent container; a suction pipe for sucking a reagent from the reagent container held by the reagent container holding portion; a suction pipe moving mechanism advancing the suction pipe into the reagent container held by the reagent container holding portion and retreating the suction pipe out of the reagent container; and a withdrawal prevention member movable to a raised withdrawal position allowing withdrawal of the reagent container from the reagent container holding portion and a lowered withdrawal prevention position preventing withdrawal of the reagent container from the reagent container holding portion, wherein the suction pipe moving mechanism is configured to move the suction pipe in association with movement of the withdrawal prevention member, and so configured that the suction pipe enters the reagent container held by the reagent container holding portion when the withdrawal prevention member moves to the withdrawal prevention position and the suction pipe retreats out of the reagent container when the withdrawal prevention member moves to the withdrawal position, wherein the suction pipe moving mechanism is formed to hold the suction pipe and the withdrawal prevention member and is formed to integrally move the suction pipe in association with raising/lowering the withdrawal prevention member, wherein, in a state where the withdrawal prevention member is in a raised position, the suction pipe is in a raised position and wherein in a state where the withdrawal prevention member is in a lowered position, the suction pipe is in a lowered position, characterized in that: the reagent container holding portion further includes a support portion supporting the reagent container and a support portion moving mechanism moving the support portion to a first position for placing the reagent container on the support portion and a second position for arranging the reagent container on the support portion on a position where the suction pipe is enterable, and in that: the support portion moving mechanism moves the support portion in association with movement of the withdrawal prevention member so that the support portion is located on the first position when the withdrawal prevention member moves to the withdrawal position and the support portion is located on the second position when the withdrawal prevention member moves to the withdrawal prevention position. a reagent container holding portion for holding a reagent container; a suction pipe for sucking a reagent from the reagent container held by the reagent container holding portion; a suction pipe moving mechanism advancing the suction pipe into the reagent container held by the reagent container holding portion and retreating the suction pipe out of the reagent container; and a withdrawal prevention member movable to a raised withdrawal position allowing withdrawal of the reagent container from the reagent container holding portion and a lowered withdrawal prevention position preventing withdrawal of the reagent container from the reagent container holding portion, wherein the suction pipe moving mechanism is configured to move the suction pipe in association with movement of the withdrawal prevention member, and so configured that the suction pipe enters the reagent container held by the reagent container holding portion when the withdrawal prevention member moves to the withdrawal prevention position and the suction pipe retreats out of the reagent container when the withdrawal prevention member moves to the withdrawal position, wherein the suction pipe moving mechanism is formed to hold the suction pipe and the withdrawal prevention member and is formed to integrally move the suction pipe in association with raising/lowering the withdrawal prevention member, wherein, in a state where the withdrawal prevention member is in a raised position, the suction pipe is in a raised position and wherein in a state where the withdrawal prevention member is in a lowered position, the suction pipe is in a lowered position, characterized in that: the reagent container holding portion further includes a support portion supporting the reagent container and a support portion moving mechanism moving the support portion to a first position for placing the reagent container on the support portion and a second position for arranging the reagent container on the support portion on a position where the suction pipe is enterable, and in that: the support portion moving mechanism moves the support portion in association with movement of the withdrawal prevention member so that the support portion is located on the first position when the withdrawal prevention member moves to the withdrawal position and the support portion is located on the second position when the withdrawal prevention member moves to the withdrawal prevention position.