A fluid flow control device for a faucet piece, the device comprising: a cylindrical type housing provided with a plurality of water discharge holes at a bottom part of the cylindrical type housing and having an opening portion on an upper side of the cylindrical type housing; a water dispersion means provided inside the housing and configured to uniformly disperse water flowing in; a cylindrical type mounting member having a lower end portion coupled to an upper end portion of the housing, so as to be able to rotate relatively to the upper end portion of the housing, wherein the cylindrical type mounting member is provided with a plurality of water discharge holes at a bottom part of the cylindrical type mounting member, and fixable to a spout of the faucet piece; a screen mesh member provided at an upper end portion of the mounting member; a rotation guide means provided between the housing and the mounting member and configured to guide relative rotation of the housing and the mounting member; and a fluid control means configured to control flow rate of water flowing into the housing due to relative rotation between the housing and the mounting member, wherein the fluid control means comprises: a flow rate control plate member provided to be spaced apart from and interposed between the bottom part of the mounting member and the screen mesh member and having a plurality of flow rate control holes; and a flow rate control rotation blade member having one side positioned on an upper surface of the flow rate control plate member and an opposite side configured to pass through the mounting member and the water dispersion means and to be fixed to a fixing hole provided in a center of the housing. a cylindrical type housing provided with a plurality of water discharge holes at a bottom part of the cylindrical type housing and having an opening portion on an upper side of the cylindrical type housing; a water dispersion means provided inside the housing and configured to uniformly disperse water flowing in; a cylindrical type mounting member having a lower end portion coupled to an upper end portion of the housing, so as to be able to rotate relatively to the upper end portion of the housing, wherein the cylindrical type mounting member is provided with a plurality of water discharge holes at a bottom part of the cylindrical type mounting member, and fixable to a spout of the faucet piece; a screen mesh member provided at an upper end portion of the mounting member; a rotation guide means provided between the housing and the mounting member and configured to guide relative rotation of the housing and the mounting member; and a fluid control means configured to control flow rate of water flowing into the housing due to relative rotation between the housing and the mounting member, wherein the fluid control means comprises: a flow rate control plate member provided to be spaced apart from and interposed between the bottom part of the mounting member and the screen mesh member and having a plurality of flow rate control holes; and a flow rate control rotation blade member having one side positioned on an upper surface of the flow rate control plate member and an opposite side configured to pass through the mounting member and the water dispersion means and to be fixed to a fixing hole provided in a center of the housing. a flow rate control plate member provided to be spaced apart from and interposed between the bottom part of the mounting member and the screen mesh member and having a plurality of flow rate control holes; and a flow rate control rotation blade member having one side positioned on an upper surface of the flow rate control plate member and an opposite side configured to pass through the mounting member and the water dispersion means and to be fixed to a fixing hole provided in a center of the housing.