A disk drive and an arm coil support assembly are to be provided which enables a trace to be disposed with a simple construction without the need of machining arms. In one embodiment, a trace for connection between a head and an FPC is disposed on an opposite surface of each of arms and opposite to a confronting surface of each of the arms which confronts a recording surface of a disk. The trace is bent nearly vertically in the vicinity of a connection between a coil support which supports the arms, and holds a VCM coil and the arm and is connected to the FPC. The coil support includes a force mechanism having a gap for insertion therein of the trace and also having a pressure portion spaced through the gap from the surface on which the trace is disposed. The force mechanism prevents wafting of the trace from the opposite surface of the arm caused by the bending of the trace.