the mobile device mounting member 100 includes a mount body 110 with a magnetic surface so that a mobile device m with a ferromagnetic surface or attachment may be affixed to the mobile device mounting member 100 referring to fig4 6 and 9 the fixing member 200 for a cd slot is a member which is connected to the mobile device mounting member 100 and controls an upper fixing wing 221 and a lower fixing wing 213 so that a gap i 1 between the upper fixing wing 221 and the lower fixing wing 213 is greater than a width w of the cd slot and controls the upper fixing wing 221 and the lower fixing wing 213 so that a gap 12 which becomes narrowed when the upper fixing wing 221 is moved downward by exerted external force is smaller than the width w of the cd slot so as to insert and fix the upper fixing wing 221 and the lower fixing wing 213 into the cd slot referring to the same figures a detailed configuration of the fixing member 200 for a cd slot which performs the above functions includes an outer housing 210 which is opened at an upper side to form a.