A battery module, which includes cylindrical battery cells (100A, 100B) configured to be erect such that top caps thereof face upward; and a bus bar unit configured to connect the cylindrical battery cells (100A, 100B) in series and in parallel, wherein the cylindrical battery cells (100A, 100B) include: a first bank cell group in which first cylindrical battery cells are arranged in two or more rows; and a second bank cell group in which second cylindrical battery cells are arranged in two or more rows in a first direction parallel to the first bank cell group, wherein the bus bar unit includes: a first terminal bus bar disposed on the first bank cell group and electrically connected to a positive electrode of each of the first cylindrical battery cells; a second terminal bus bar disposed on the second bank cell group and electrically connected to a negative electrode of each of the second cylindrical battery cells; and a fishbone bus bar disposed on the first bank cell group and the second bank cell group and electrically connected to a negative electrode of each of the first cylindrical battery cells and a positive electrode of each of the second cylindrical battery cells, characterized in that it further comprises a cell case including a bottom frame having perforated holes perforated in an upper and lower direction so that bottom ends of the cylindrical battery cells (100A, 100B) are fitted therein; and a top frame coupled to an upper portion of the bottom frame and configured to cover the cylindrical battery cells, and wherein the top frame includes an upper plate configured to cover upper portions of the cylindrical battery cells, and wherein the upper plate includes: positive electrode connection holes formed by perforating a region thereof below which the top cap of each of the cylindrical battery cells is located; and negative electrode connection holes formed by perforating a region thereof below which a top edge of a battery can of each of the cylindrical battery cells is located. a first bank cell group in which first cylindrical battery cells are arranged in two or more rows; and a second bank cell group in which second cylindrical battery cells are arranged in two or more rows in a first direction parallel to the first bank cell group, wherein the bus bar unit includes: a first terminal bus bar disposed on the first bank cell group and electrically connected to a positive electrode of each of the first cylindrical battery cells; a second terminal bus bar disposed on the second bank cell group and electrically connected to a negative electrode of each of the second cylindrical battery cells; and a fishbone bus bar disposed on the first bank cell group and the second bank cell group and electrically connected to a negative electrode of each of the first cylindrical battery cells and a positive electrode of each of the second cylindrical battery cells, a first terminal bus bar disposed on the first bank cell group and electrically connected to a positive electrode of each of the first cylindrical battery cells; a second terminal bus bar disposed on the second bank cell group and electrically connected to a negative electrode of each of the second cylindrical battery cells; and a fishbone bus bar disposed on the first bank cell group and the second bank cell group and electrically connected to a negative electrode of each of the first cylindrical battery cells and a positive electrode of each of the second cylindrical battery cells, a bottom frame having perforated holes perforated in an upper and lower direction so that bottom ends of the cylindrical battery cells (100A, 100B) are fitted therein; and a top frame coupled to an upper portion of the bottom frame and configured to cover the cylindrical battery cells, and wherein the top frame includes an upper plate configured to cover upper portions of the cylindrical battery cells, and wherein the upper plate includes: positive electrode connection holes formed by perforating a region thereof below which the top cap of each of the cylindrical battery cells is located; and negative electrode connection holes formed by perforating a region thereof below which a top edge of a battery can of each of the cylindrical battery cells is located. positive electrode connection holes formed by perforating a region thereof below which the top cap of each of the cylindrical battery cells is located; and negative electrode connection holes formed by perforating a region thereof below which a top edge of a battery can of each of the cylindrical battery cells is located.