A semiconductor storage includes a stack, columns, and first, second, third, fourth, and fifth insulators. The stack includes first conductive layers, and second and third conductive layers below and above the first conductive layers, respectively. The columns penetrate the stack in a first direction. The first and second insulators penetrate the stack and are separated from each other in a second direction. The third insulator is between the first and second insulators in a third direction. The third insulator includes first and second portions apart from each other in the second direction. The fourth insulator is between the first and second portions. The fifth insulator is between the first and second portions above the fourth insulator. The second conductive layer includes two electrically-separated regions, between which the third and fourth insulators are provided. The third conductive layer includes two electrically-separated regions between which the third and fifth insulators are provided.