An imaging device comprising: a case body (12, 13); an imaging unit provided at the case body (12, 13) and adapted to image an object; an operation input unit adapted to input a user operation into the imaging device; a first instruction unit adapted to instruct the imaging unit to execute the imaging when the user operation is input via the operation input unit; a second instruction unit adapted to instruct, based on a trigger other than the user operation, the imaging unit to execute the imaging; a control unit adapted to perform, based on a state of the case body (12, 13), a control to invalidate the instruction by the first instruction unit or the instruction by the second instruction unit; and a bottom contact detection unit adapted to detect a state of the imaging device, in which a bottom of the imaging device contacts something, wherein the case body (12, 13) has two bodies connected by a hinge member which are rotatable around the hinge axis and which are adapted to be positioned in an open state or in a close state and wherein the imaging unit is situated on one of the outer surfaces of the two bodies in their closed states; and the control unit is adapted to control whether or not the instruction by the second instruction unit is invalidated, based on an open or closed state of the bodies as the state of the case body (12, 13); the bottom contact detection unit is adapted to detect whether or not the two bodies (12, 13) are a predetermined bottom contact state; wherein when the two bodies of the case body (12, 13) are in an open state at a predetermined angle as the state of the case body (12, 13) and the predetermined bottom contact state is detected by the bottom contact detection unit, the control unit is adapted to perform the control to invalidate the instruction by the first instruction unit and to validate the instruction by the second instruction unit. a case body (12, 13); an imaging unit provided at the case body (12, 13) and adapted to image an object; an operation input unit adapted to input a user operation into the imaging device; a first instruction unit adapted to instruct the imaging unit to execute the imaging when the user operation is input via the operation input unit; a second instruction unit adapted to instruct, based on a trigger other than the user operation, the imaging unit to execute the imaging; a control unit adapted to perform, based on a state of the case body (12, 13), a control to invalidate the instruction by the first instruction unit or the instruction by the second instruction unit; and a bottom contact detection unit adapted to detect a state of the imaging device, in which a bottom of the imaging device contacts something, wherein the case body (12, 13) has two bodies connected by a hinge member which are rotatable around the hinge axis and which are adapted to be positioned in an open state or in a close state and wherein the imaging unit is situated on one of the outer surfaces of the two bodies in their closed states; and the control unit is adapted to control whether or not the instruction by the second instruction unit is invalidated, based on an open or closed state of the bodies as the state of the case body (12, 13); the bottom contact detection unit is adapted to detect whether or not the two bodies (12, 13) are a predetermined bottom contact state; wherein when the two bodies of the case body (12, 13) are in an open state at a predetermined angle as the state of the case body (12, 13) and the predetermined bottom contact state is detected by the bottom contact detection unit, the control unit is adapted to perform the control to invalidate the instruction by the first instruction unit and to validate the instruction by the second instruction unit.