The present invention provides a shock-resistant magnetic tape apparatus. Even if the apparatus is subjected to a shock, no data destruction is caused in adjacent tracks. The apparatus comprises: a magnetic tape 1 having a servo region for head positioning; a head holding mechanism 3 for reciprocally moving a magnetic head 2 in a direction of width of the magnetic tape 1; a head positioning mechanism 4; a main controller 11 for driving the head positioning mechanism 4 according to the servo information of the magnetic tape 1; a write control circuit 12 for controlling data write by the magnetic head; a shock sensor 13 arranged in the head holding mechanism, for detecting a predetermined shock and producing a corresponding signal; and stop signal output circuit (comparator) 16 for producing an operation stop signal to the main controller 11 and the write control circuit 12 according to the output from the shock sensor.