A method for manufacturing a display panel includes providing a mother substrate that includes a display area and a non-display area, and includes a first substrate, a second substrate facing the first substrate, and a sealant provided between the first substrate and the second substrate, generating a crack on the sealant through irradiation of laser onto the sealant between the first substrate and the second substrate, and cutting a part of the second substrate and a part of the sealant at a position corresponding to the crack.