A vehicle door latch device comprising: an engagement unit having a body which includes an engagement mechanism capable of engaging with a striker of a vehicle body side and is intended to be fixed to an inner panel inside a door, an operation unit coupled to the body at a substantially right angle so as to be faced to an inner surface of a vehicle interior side of the inner panel, and having a housing including elements capable of switching an unlocking state that can release the engagement state between the engagement mechanism and the striker and a locking state that cannot release the engagement state, and an engaged portion (21, 26, 231, 232) capable of suspending the engagement unit and the operation unit inside the door, wherein in the engagement unit or the operation unit, the engaged portion (21, 26, 231, 232) is provided on a facing portion facing the inner surface of the vehicle interior side of the inner panel in the housing, such that the engagement unit and the operation unit can be suspended inside the door by engaging the engaged portion (21, 26, 231, 232) with the inner panel in a state that the engagement unit is not fixed to the inner panel, the engaged portion (231, 232) provided in the housing is an elastic engaging piece formed on an outer peripheral surface of a connector connecting portion which is provided in a side surface of a vehicle interior side of the housing in order to electrically conduct to the electrical elements, and the elastic engaging piece (231, 232) is engaged with a peripheral surface of a vehicle interior side of an opening portion provided in the inner panel by fitting the connector connecting portion into the opening portion together with the elastic engaging piece (231, 232), characterized in that the engaged portion (21, 26, 231, 232) is also provided on a facing portion facing the inner panel to which the body is fixed. an engagement unit having a body which includes an engagement mechanism capable of engaging with a striker of a vehicle body side and is intended to be fixed to an inner panel inside a door, an operation unit coupled to the body at a substantially right angle so as to be faced to an inner surface of a vehicle interior side of the inner panel, and having a housing including elements capable of switching an unlocking state that can release the engagement state between the engagement mechanism and the striker and a locking state that cannot release the engagement state, and an engaged portion (21, 26, 231, 232) capable of suspending the engagement unit and the operation unit inside the door, wherein in the engagement unit or the operation unit, the engaged portion (21, 26, 231, 232) is provided on a facing portion facing the inner surface of the vehicle interior side of the inner panel in the housing, such that the engagement unit and the operation unit can be suspended inside the door by engaging the engaged portion (21, 26, 231, 232) with the inner panel in a state that the engagement unit is not fixed to the inner panel, the engaged portion (231, 232) provided in the housing is an elastic engaging piece formed on an outer peripheral surface of a connector connecting portion which is provided in a side surface of a vehicle interior side of the housing in order to electrically conduct to the electrical elements, and the elastic engaging piece (231, 232) is engaged with a peripheral surface of a vehicle interior side of an opening portion provided in the inner panel by fitting the connector connecting portion into the opening portion together with the elastic engaging piece (231, 232), characterized in that the engaged portion (21, 26, 231, 232) is also provided on a facing portion facing the inner panel to which the body is fixed.