A charger, for a portable battery used in an electric vehicle, the charger comprising: a tray in which the battery can be placed; and a control device which performs charging control of the battery; wherein the tray has a first inclined surface which is inclined with respect to a horizontal surface and is formed in a length direction of the battery in a state of being placed in the charger, and a second inclined surface which rises from a rear lower end portion on the first inclined surface in a height direction of the battery in a state of being placed in the charger and receives a bottom surface of the battery, wherein the control device is disposed below the first inclined surface, wherein an upper cover covering a charger terminal from above is provided in an upper rear portion of the charger, characterized in that the charger further comprises a frame which is positioned above the control device, wherein the frame is disposed between the control device and the first inclined surface in a vertical direction, wherein the frame is disposed on a side in front of a central portion on the first inclined surface in the length direction, wherein the upper cover has an opening edge portion along one surface of the battery in a state of being placed in the charger, wherein the frame is disposed on a side in front of the opening edge portion, wherein the tray has a placement surface recess portion which is recessed downward beyond the first inclined surface at an end portion on a side of a grip portion of the battery in a state of being placed in the charger, wherein the placement surface recess portion has a size to an extent that a portion of a hand of a user enters, wherein the frame is disposed behind and in the vicinity of a rising portion of the placement surface recess portion, and wherein the rising portion rises upward toward the first inclined surface from a rear end on a bottom surface of the placement surface recess portion. a tray in which the battery can be placed; and a control device which performs charging control of the battery; wherein the tray has a first inclined surface which is inclined with respect to a horizontal surface and is formed in a length direction of the battery in a state of being placed in the charger, and a second inclined surface which rises from a rear lower end portion on the first inclined surface in a height direction of the battery in a state of being placed in the charger and receives a bottom surface of the battery, a first inclined surface which is inclined with respect to a horizontal surface and is formed in a length direction of the battery in a state of being placed in the charger, and a second inclined surface which rises from a rear lower end portion on the first inclined surface in a height direction of the battery in a state of being placed in the charger and receives a bottom surface of the battery, wherein the control device is disposed below the first inclined surface, wherein an upper cover covering a charger terminal from above is provided in an upper rear portion of the charger, characterized in that the charger further comprises a frame which is positioned above the control device, wherein the frame is disposed between the control device and the first inclined surface in a vertical direction, wherein the frame is disposed on a side in front of a central portion on the first inclined surface in the length direction, wherein the upper cover has an opening edge portion along one surface of the battery in a state of being placed in the charger, wherein the frame is disposed on a side in front of the opening edge portion, wherein the tray has a placement surface recess portion which is recessed downward beyond the first inclined surface at an end portion on a side of a grip portion of the battery in a state of being placed in the charger, wherein the placement surface recess portion has a size to an extent that a portion of a hand of a user enters, wherein the frame is disposed behind and in the vicinity of a rising portion of the placement surface recess portion, and wherein the rising portion rises upward toward the first inclined surface from a rear end on a bottom surface of the placement surface recess portion.