An aluminum plate having a plurality of through holes that penetrate in a thickness direction, wherein an average opening diameter of the through holes is 1 μm to 100 μm, a density of the through holes is 50 through holes/mm 2 to 2,000 through holes/mm 2, and the maximum value of the inter-hole distance between adjacent through holes is 300 μm or less, wherein the average opening diameter of the through holes is obtained by capturing an image of the surface of the aluminum plate using a high-resolution scanning electron microscope at a magnification of 100 times, extracting at least 20 through holes having a circumference that continues in a ring shape from the obtained SEM image, scanning the maximum values of the distances between the end portions of the opening portions of the through holes as the opening diameters, and computing the average value thereof as the average opening diameter, wherein the density of the through holes is obtained by installing a parallel light optical unit on one surface side of the aluminum plate, transmitting parallel light, capturing an image of the surface of the aluminum plate using an optical microscope at a magnification of 100 times on the other surface side of the aluminum plate so as to obtain a photograph, counting the number of through holes at five 100 mm×75 mm visual fields in a 10 cm×10 cm range of the obtained photograph, calculating the number of through holes per square millimeter, and considering the average value of the values measured at the respective visual fields (five places) as the density of the through holes, and wherein the inter-hole distance is obtained as defined in the description, wherein the aluminum plate having a plurality of through holes is obtainable by carrying out the following steps: an oxidized film-forming step of forming an oxidized film by carrying out an oxidized film-forming treatment on the surface of an aluminum substrate, a through hole-forming step of forming through holes by carrying out an electrochemical dissolution treatment after the oxidized film-forming step, and an oxidized film-removing step of removing the oxidized film from the aluminum plate. wherein an average opening diameter of the through holes is 1 μm to 100 μm, a density of the through holes is 50 through holes/mm 2 to 2,000 through holes/mm 2, and the maximum value of the inter-hole distance between adjacent through holes is 300 μm or less, wherein the average opening diameter of the through holes is obtained by capturing an image of the surface of the aluminum plate using a high-resolution scanning electron microscope at a magnification of 100 times, extracting at least 20 through holes having a circumference that continues in a ring shape from the obtained SEM image, scanning the maximum values of the distances between the end portions of the opening portions of the through holes as the opening diameters, and computing the average value thereof as the average opening diameter, wherein the density of the through holes is obtained by installing a parallel light optical unit on one surface side of the aluminum plate, transmitting parallel light, capturing an image of the surface of the aluminum plate using an optical microscope at a magnification of 100 times on the other surface side of the aluminum plate so as to obtain a photograph, counting the number of through holes at five 100 mm×75 mm visual fields in a 10 cm×10 cm range of the obtained photograph, calculating the number of through holes per square millimeter, and considering the average value of the values measured at the respective visual fields (five places) as the density of the through holes, and wherein the inter-hole distance is obtained as defined in the description, wherein the aluminum plate having a plurality of through holes is obtainable by carrying out the following steps: an oxidized film-forming step of forming an oxidized film by carrying out an oxidized film-forming treatment on the surface of an aluminum substrate, a through hole-forming step of forming through holes by carrying out an electrochemical dissolution treatment after the oxidized film-forming step, and an oxidized film-removing step of removing the oxidized film from the aluminum plate. an oxidized film-forming step of forming an oxidized film by carrying out an oxidized film-forming treatment on the surface of an aluminum substrate, a through hole-forming step of forming through holes by carrying out an electrochemical dissolution treatment after the oxidized film-forming step, and an oxidized film-removing step of removing the oxidized film from the aluminum plate.