An electrochromic device comprising: a first substrate; a first electrode disposed on the first substrate; a second substrate opposite to the first substrate; a second electrode disposed on the second substrate; an electrochromic material layer disposed between the first electrode and the second electrode a seal disposed between the first substrate and the second substrate and surrounding the electrochromic material layer; and a light shielding pattern layer disposed on the first substrate and shielding the seal and a portion of the electrochromic material layer, wherein the first electrode disposed on the first substrate and the second electrode disposed on the second substrate are not electrically connected to each other, the electrochromic device being characterized in that the light shielding pattern layer is made of an insulating material and has a through hole, the through hole and the seal are staggered in plan view, so that the through hole is arranged outside the seal, the through hole and the electrochromic material layer are staggered, in plan view, the electrochromic device further comprises: a conductive material filling the through hole of the light shielding pattern layer; and a first conductor disposed between the light shielding pattern layer and the second substrate and located near to the seal, wherein the first conductor is electrically connected to the first electrode through the conductive material filling the through hole of the light shielding pattern layer. a first substrate; a first electrode disposed on the first substrate; a second substrate opposite to the first substrate; a second electrode disposed on the second substrate; an electrochromic material layer disposed between the first electrode and the second electrode a seal disposed between the first substrate and the second substrate and surrounding the electrochromic material layer; and a light shielding pattern layer disposed on the first substrate and shielding the seal and a portion of the electrochromic material layer, wherein the first electrode disposed on the first substrate and the second electrode disposed on the second substrate are not electrically connected to each other, the electrochromic device being characterized in that the light shielding pattern layer is made of an insulating material and has a through hole, the through hole and the seal are staggered in plan view, so that the through hole is arranged outside the seal, the through hole and the electrochromic material layer are staggered, in plan view, the electrochromic device further comprises: a conductive material filling the through hole of the light shielding pattern layer; and a first conductor disposed between the light shielding pattern layer and the second substrate and located near to the seal, wherein the first conductor is electrically connected to the first electrode through the conductive material filling the through hole of the light shielding pattern layer. a conductive material filling the through hole of the light shielding pattern layer; and a first conductor disposed between the light shielding pattern layer and the second substrate and located near to the seal, wherein the first conductor is electrically connected to the first electrode through the conductive material filling the through hole of the light shielding pattern layer.