A substrate for an image sensor according to an embodiment includes an insulating layer; and a conductive pattern portion disposed on the insulating layer, wherein the insulating layer comprises: a first insulating part; and a second insulating part surrounding the first insulating part and spaced apart from the first insulating part with an open region therebetween, wherein the conductive pattern portion comprises a first lead pattern part disposed on the first insulating part; a second lead pattern part disposed on the second insulating part; and an extension pattern part disposed on the open region of the insulating layer to connect the first lead pattern part with the second lead pattern part and including a bent portion.