A door latch apparatus for a vehicle includes a latch, a pawl, a motor, a release power transmitting mechanism, an active rotary member arranged in a standby area in a normal state, a driven rotation member rotating about a rotational shaft arranged in parallel with a rotational shaft of the active rotary member and away therefrom, a cam projection formed at the active rotary member, a cam groove formed at the driven rotation member and slidably engaging with the cam projection, the cam groove extending away from a reference line when the standby area is arranged close to one side of the rotation range and the active rotary member is positioned close to the one side of the rotation range, and a standby state detecting device detecting whether or not the active rotary member is arranged within the standby area based on a rotational position of the driven rotation member.