An electrooptic device includes a first substrate and a second substrate. The first substrate includes an electrooptic element in which an electrooptic substance is interposed between a first electrode and a second electrode, the electrooptic element being disposed on a surface of the first substrate that opposes the second substrate; an electronic element for driving the electrooptic element; and a power supply wire for supplying power to at least one of the electrooptic element and the electronic element. The second substrate includes a second auxiliary wire for supplying auxiliary power to at least one of the electrooptic element and the electronic element, the second auxiliary wire being disposed on a surface of the second substrate that opposes the first substrate, the second auxiliary wire having a planar shape that corresponds with a non-opening region of the electrooptic element.