A multibubble injection type Dissolved Air Flotation, DAF, water treatment apparatus for removing suspended particles contained in feed water to be treated, the DAF water treatment apparatus comprising: a mixing and coagulation basin configured to stir a coagulant and feed water when the coagulant is injected into the feed water so as to form and grow up flocs through coagulation of suspended particles; a flotation basin configured to inject micro bubbles and make the micro bubbles contact with the floes contained in the feed water to form a combined body, raise the combined body to the surface of water and remove the combined body; and micro bubble distributing means having a nozzle configured to receive saturated water, in which air is saturated, through a saturated water supply pipe in order to spray the saturated water into the flotation basin, wherein the flotation basin is divided into a contact zone, in which the injected micro bubbles and the floes come into contact with each other, and a separation zone, which removes the combined body rising to the surface of water and discharges treated water to a rear end, by a partition upwardly extending from a bottom surface of the flotation basin, wherein the micro bubbles are injected through the micro bubble distributing means so that the micro bubbles are supplied to both a lower part of the contact zone and a lower part of the separation zone, and wherein the nozzle is disposed at the lower part of the contact zone, the partition has a wing part which protrudes towards the contact zone at a predetermined height of the partition, the partition upwardly extending from the bottom of the flotation basin partitioning thus the contact zone and a separation zone, and an outer end of the wing part being located above a spray hole of the nozzle mounted at the lower part of the contact zone, so that some of the micro bubbles injected through the nozzle collide against the wing part and are guided to the separation zone by the wing part, wherein the communication with the separation zone is formed by a plurality of first communication holes formed on the portion of the partition from where the wing part is formed to the bottom end of the partition. a mixing and coagulation basin configured to stir a coagulant and feed water when the coagulant is injected into the feed water so as to form and grow up flocs through coagulation of suspended particles; a flotation basin configured to inject micro bubbles and make the micro bubbles contact with the floes contained in the feed water to form a combined body, raise the combined body to the surface of water and remove the combined body; and micro bubble distributing means having a nozzle configured to receive saturated water, in which air is saturated, through a saturated water supply pipe in order to spray the saturated water into the flotation basin, wherein the flotation basin is divided into a contact zone, in which the injected micro bubbles and the floes come into contact with each other, and a separation zone, which removes the combined body rising to the surface of water and discharges treated water to a rear end, by a partition upwardly extending from a bottom surface of the flotation basin, wherein the micro bubbles are injected through the micro bubble distributing means so that the micro bubbles are supplied to both a lower part of the contact zone and a lower part of the separation zone, and wherein the nozzle is disposed at the lower part of the contact zone, the partition has a wing part which protrudes towards the contact zone at a predetermined height of the partition, the partition upwardly extending from the bottom of the flotation basin partitioning thus the contact zone and a separation zone, and an outer end of the wing part being located above a spray hole of the nozzle mounted at the lower part of the contact zone, so that some of the micro bubbles injected through the nozzle collide against the wing part and are guided to the separation zone by the wing part, wherein the communication with the separation zone is formed by a plurality of first communication holes formed on the portion of the partition from where the wing part is formed to the bottom end of the partition.