A bracket for holding an in-vehicle device inside a window glass comprising: a base which is configured to be fixed to an inside surface of the window glass; right and left side portions which protrude downward from the base; a locking member that is assembled so as to be movable between a first position and a second position; and at least one support portion configured to receive a supported portion provided in the in-vehicle device and inserted between the right and left side portions from a lateral direction while the locking member is located at the first position, wherein when the locking member is moved to the second position while the supported portion is received by the support portion, the locking member is pressed against the supported portion so that the in-vehicle device is held in any of the front to rear direction and the up to down direction without rattling, characterized in that the locking member is arranged to rotatably assemble a base portion of the locking member with the side portion, a free end of the locking member is located outside the side portion when the locking member is located at the first position, and the free end is located behind the supported portion received by the support portion when the locking member is located at the second position, such as the locking member is provided in the side portion of the bracket so as to be rotatable between the first position in which the plate surface of a plate-shaped main portion of the locking member is substantially orthogonal to the outer surface of the side portion and a second position in which the plate surface of the plate-shaped main portion is substantially parallel to the outer surface of the side portion. a base which is configured to be fixed to an inside surface of the window glass; right and left side portions which protrude downward from the base; a locking member that is assembled so as to be movable between a first position and a second position; and at least one support portion configured to receive a supported portion provided in the in-vehicle device and inserted between the right and left side portions from a lateral direction while the locking member is located at the first position, wherein when the locking member is moved to the second position while the supported portion is received by the support portion, the locking member is pressed against the supported portion so that the in-vehicle device is held in any of the front to rear direction and the up to down direction without rattling, characterized in that the locking member is arranged to rotatably assemble a base portion of the locking member with the side portion, a free end of the locking member is located outside the side portion when the locking member is located at the first position, and the free end is located behind the supported portion received by the support portion when the locking member is located at the second position, such as the locking member is provided in the side portion of the bracket so as to be rotatable between the first position in which the plate surface of a plate-shaped main portion of the locking member is substantially orthogonal to the outer surface of the side portion and a second position in which the plate surface of the plate-shaped main portion is substantially parallel to the outer surface of the side portion.