Disclosed is a device for inducing microflow of fluid. The device is installed on a rotation driving part and induces the fluid to flow by centrifugal force. The device includes: a lower structure including a microfluidic structure that comprises a collection chamber containing a target material separated from a sample, and a channel forming an inlet through which the target material enters into the collection member; an upper plate which forms an upper wall of the collection chamber and the channel; and a cover which is integrated into the upper plate and can be removed from the upper plate to open at least a portion of the collection chamber.
