An imaging apparatus having a function for suppressing an image blur, comprising: a mechanism for suppressing the image blur, with an origin position defined by an intersection of an X-Y plane orthogonal to a photographing optical axis Z-axis with the Z-axis, which calculates, as a target value, a movement amount of an image by detecting camera shake with a camera shake detection sensor, detects an actual position of an image pick-up device that forms a subject image by using a position detection element, and moves the image pick-up device to follow an image of the subject moved by the camera shake based on a difference between the target value and a displacement amount from the origin position, at which the optical center of the image pick-up device is located, based on the detection value of the position detection element; an origin position forced retention mechanism provided in the suppression mechanism, which mechanically fastens the image pick-up device to be retained in the origin position; the suppression mechanism comprises a mounting stage which mounts the image pick-up device, the mounting stage being moved within the X-Y plane by operation of the suppression mechanism, and the origin position forced retention mechanism includes a pressing member which has contact with the image pick-up device along the Z-axis direction from a side opposite to an imaging plane of the image pick-up device and fastens the image pick-up device to be retained in the origin position, when the suppression mechanism is not operated;. wherein the image pick-up device is provided with either a fitting hole or a fitting projection, and the pressing member is provided with the other; and characterized in that the origin position forced retention mechanism comprises a rotation driving source and a conversion mechanism which is configured to convert rotational movement of the rotation driving source into linear motion, and the pressing member forms a part of the conversion mechanism and is configured to move away from and come close to the mounting stage along the Z-axis direction by driving force from the rotation driving source so that the fitting projection closely fits into the fitting hole in order to fulfil the function for mechanically retaining the mounting stage on the origin position and separates from the fitting hole to release the mounting stage, respectively. a mechanism for suppressing the image blur, with an origin position defined by an intersection of an X-Y plane orthogonal to a photographing optical axis Z-axis with the Z-axis, which calculates, as a target value, a movement amount of an image by detecting camera shake with a camera shake detection sensor, detects an actual position of an image pick-up device that forms a subject image by using a position detection element, and moves the image pick-up device to follow an image of the subject moved by the camera shake based on a difference between the target value and a displacement amount from the origin position, at which the optical center of the image pick-up device is located, based on the detection value of the position detection element; an origin position forced retention mechanism provided in the suppression mechanism, which mechanically fastens the image pick-up device to be retained in the origin position; the suppression mechanism comprises a mounting stage which mounts the image pick-up device, the mounting stage being moved within the X-Y plane by operation of the suppression mechanism, and the origin position forced retention mechanism includes a pressing member which has contact with the image pick-up device along the Z-axis direction from a side opposite to an imaging plane of the image pick-up device and fastens the image pick-up device to be retained in the origin position, when the suppression mechanism is not operated;. wherein the image pick-up device is provided with either a fitting hole or a fitting projection, and the pressing member is provided with the other; and characterized in that the origin position forced retention mechanism comprises a rotation driving source and a conversion mechanism which is configured to convert rotational movement of the rotation driving source into linear motion, and the pressing member forms a part of the conversion mechanism and is configured to move away from and come close to the mounting stage along the Z-axis direction by driving force from the rotation driving source so that the fitting projection closely fits into the fitting hole in order to fulfil the function for mechanically retaining the mounting stage on the origin position and separates from the fitting hole to release the mounting stage, respectively.