Active matrix substrate and liquid crystal display device

An active matrix substrate provided with a display region defined by a plurality of pixel regions, the active matrix substrate comprising:

• a substrate;
• a transistor supported by the substrate and disposed on each of the plurality of pixel regions, the transistor including
• an oxide semiconductor layer provided on the substrate, the oxide semiconductor layer including a channel region, a source contact region, and a drain contact region, the source contact region and the drain contact region positioned, respectively, at any one side of the channel region,
• a gate insulating layer provided on the channel region, and
• a gate electrode provided on the gate insulating layer and formed by a gate metal layer, the gate electrode facing the channel region with the gate insulating layer interposed between the channel region and the gate electrode;
• an interlayer insulation layer covering the transistor, the interlayer insulation layer having a first contact hole located on the drain contact region;
• a transparent connection electrode provided on the interlayer insulation layer and electrically connected to the drain contact region via the first contact hole, the transparent connection electrode including a first portion extending from the first contact hole to right above the gate metal layer, and a second portion extending opposite to the first portion;
• an organic insulating layer covering the transistor and the transparent connection electrode, and having a second contact hole located on the first portion, a bottom of the second contact hole overlapping the gate metal layer when viewed from a normal direction of the substrate, a side surface of the second contact hole having a curved shape in a cross-sectional view;
• and
• a pixel electrode provided on the organic insulating layer and electrically connected to the first portion of the transparent connection electrode via the second contact hole, the pixel electrode extending from the second contact hole beyond an end edge of the second portion of the transparent connection electrode.