A battery housing device comprising: a case (2,3) having a plus terminal and a minus terminal and configured to house at least one battery (4,5), wherein each battery (4,5) is cylindrical with a peripheral side wall, with a bottom face and a top face spaced apart in the axial direction, and with a plus pole and a minus pole at a respective one of the bottom and top faces; a plus pole spring (21a,22b) provided in the case (2,3) and having one end connected to the plus terminal and an opposite end configured to come in contact with the plus pole of the at least one battery (4,5); a minus pole spring (21b,22a) provided in the case (2,3) and having one end connected to the minus terminal and an opposite end configured to come in contact with the minus pole of the at least one battery (4,5); and a battery support configured to support the bottom face and side wall of each battery (4,5), wherein the battery support comprises at least one battery fixing part (51,52) for supporting the bottom face of a respective battery (4,5) and at least one side wall support part for supporting the side wall of the respective battery (4,5), wherein each battery fixing part (51,52) comprises a hole (51h,52h) of a shape larger than a connection portion of one of the plus pole spring (21a,22b) or the minus pole spring (21b,22a) so that the one of the plus pole spring (21a,22b) or the minus pole spring (21b,22a) can be connected to the battery (4,5) when the same is supported on the battery fixing part (51,52), and a plurality of fixing members (51a-c,52a-c) configured and arranged such that they are placed about a peripheral margin of the bottom face of the battery (4,5) to fix the position of the bottom face of the battery (4,5) in the radial direction of the battery (4,5), and wherein the at least one side wall support part is in the form of a plate extending in the axial direction of the battery (4,5), is joined to one end of the battery fixing part (51,52), and is dimensioned to come in contact with the side wall of the battery (4,5) when the same is supported on the battery fixing part (51,52). a case (2,3) having a plus terminal and a minus terminal and configured to house at least one battery (4,5), wherein each battery (4,5) is cylindrical with a peripheral side wall, with a bottom face and a top face spaced apart in the axial direction, and with a plus pole and a minus pole at a respective one of the bottom and top faces; a plus pole spring (21a,22b) provided in the case (2,3) and having one end connected to the plus terminal and an opposite end configured to come in contact with the plus pole of the at least one battery (4,5); a minus pole spring (21b,22a) provided in the case (2,3) and having one end connected to the minus terminal and an opposite end configured to come in contact with the minus pole of the at least one battery (4,5); and a battery support configured to support the bottom face and side wall of each battery (4,5), wherein the battery support comprises at least one battery fixing part (51,52) for supporting the bottom face of a respective battery (4,5) and at least one side wall support part for supporting the side wall of the respective battery (4,5), wherein each battery fixing part (51,52) comprises a hole (51h,52h) of a shape larger than a connection portion of one of the plus pole spring (21a,22b) or the minus pole spring (21b,22a) so that the one of the plus pole spring (21a,22b) or the minus pole spring (21b,22a) can be connected to the battery (4,5) when the same is supported on the battery fixing part (51,52), and a plurality of fixing members (51a-c,52a-c) configured and arranged such that they are placed about a peripheral margin of the bottom face of the battery (4,5) to fix the position of the bottom face of the battery (4,5) in the radial direction of the battery (4,5), and wherein the at least one side wall support part is in the form of a plate extending in the axial direction of the battery (4,5), is joined to one end of the battery fixing part (51,52), and is dimensioned to come in contact with the side wall of the battery (4,5) when the same is supported on the battery fixing part (51,52).