A method for manufacturing an electrowetting display unit includes the following steps. A first substrate and a second substrate are provided. A first conductive layer is disposed on one side of the first substrate. A second conductive layer is disposed on one side of the second substrate. A polymer layer, which includes a siloxane containing a light-induced cross linkable group and a Si—H bond, is disposed on the first conductive layer. The molecular weight of the monomer of the siloxane is equal to or greater than 5000. A part of the polymer layer is exposed to a light so as to form a plurality of hydrophobic sections. A hydrophilic section is developed by treating a developing agent. The hydrophilic section and the plurality of hydrophobic sections form a pattern layer together. Polar liquid and non-polar liquid are disposed between the pattern layer and the second conductive layer.