A high-pressure tank (10, 10a) configured to store a fluid, comprising: a liner (40, 40a); and a fiber-reinforced resin layer (50, 50a) configured to include a fiber and to cover surface of the liner (40, 40a), wherein the liner (40, 40a) includes: a cylindrical liner portion (42, 42a) in a cylindrical shape; and dome liner portions (44, 44a) in a dome shape connected with respective sides of the cylindrical liner (42, 42a) portion, each the dome liner portion (44, 44a) being connected with the cylindrical liner portion (42, 42a), such that an outer surface of the dome liner (44, 44a) portion is inclined at a predetermined angle to an outer surface of the cylindrical liner portion (42, 42a), wherein the fiber-reinforced resin layer includes: a hoop layer formed on the outer surface of the cylindrical liner portion (42, 42a) to cover the outer surface of the cylindrical liner portion (42, 42a), the hoop layer being provided by hoop winding that winds the fiber substantially perpendicularly to a central axis of the cylindrical liner portion (42, 42a). wherein the hoop layer is formed, such that an outer surface of the hoop layer has a smaller angle than the predetermined angle to the outer surface of the dome liner portion (44, 44a) at a boundary between the hoop layer and the dome liner portion (44, 44a), wherein the hoop layer includes: a cylindrical hoop portion configured to have a fixed thickness; and a dome hoop portion located between the cylindrical hoop portion and the dome liner portion (44, 44a), the dome hoop being configured to have thickness gradually decreasing from the fixed thickness, from the cylindrical hoop portion toward the dome liner portion (44, 44a). a liner (40, 40a); and a fiber-reinforced resin layer (50, 50a) configured to include a fiber and to cover surface of the liner (40, 40a), wherein the liner (40, 40a) includes: a cylindrical liner portion (42, 42a) in a cylindrical shape; and dome liner portions (44, 44a) in a dome shape connected with respective sides of the cylindrical liner (42, 42a) portion, each the dome liner portion (44, 44a) being connected with the cylindrical liner portion (42, 42a), such that an outer surface of the dome liner (44, 44a) portion is inclined at a predetermined angle to an outer surface of the cylindrical liner portion (42, 42a), a cylindrical liner portion (42, 42a) in a cylindrical shape; and dome liner portions (44, 44a) in a dome shape connected with respective sides of the cylindrical liner (42, 42a) portion, each the dome liner portion (44, 44a) being connected with the cylindrical liner portion (42, 42a), such that an outer surface of the dome liner (44, 44a) portion is inclined at a predetermined angle to an outer surface of the cylindrical liner portion (42, 42a), wherein the fiber-reinforced resin layer includes: a hoop layer formed on the outer surface of the cylindrical liner portion (42, 42a) to cover the outer surface of the cylindrical liner portion (42, 42a), the hoop layer being provided by hoop winding that winds the fiber substantially perpendicularly to a central axis of the cylindrical liner portion (42, 42a). a hoop layer formed on the outer surface of the cylindrical liner portion (42, 42a) to cover the outer surface of the cylindrical liner portion (42, 42a), the hoop layer being provided by hoop winding that winds the fiber substantially perpendicularly to a central axis of the cylindrical liner portion (42, 42a). wherein the hoop layer is formed, such that an outer surface of the hoop layer has a smaller angle than the predetermined angle to the outer surface of the dome liner portion (44, 44a) at a boundary between the hoop layer and the dome liner portion (44, 44a), wherein the hoop layer includes: a cylindrical hoop portion configured to have a fixed thickness; and a dome hoop portion located between the cylindrical hoop portion and the dome liner portion (44, 44a), the dome hoop being configured to have thickness gradually decreasing from the fixed thickness, from the cylindrical hoop portion toward the dome liner portion (44, 44a). a cylindrical hoop portion configured to have a fixed thickness; and a dome hoop portion located between the cylindrical hoop portion and the dome liner portion (44, 44a), the dome hoop being configured to have thickness gradually decreasing from the fixed thickness, from the cylindrical hoop portion toward the dome liner portion (44, 44a).