would cause such inconvenience if it is worn for a long time the belt 104 excepting for the mount portion 94 is generally formed of soft leather like material and includes a fastening belt portion 108 having attached thereto peelable adhesive textile 106 tradename velclo a metal ring 110 through which the belt portion 108 may be passed to fit around the wrist and a thumb holding portion 112 in which the wearer 39 s thumb may be inserted such belt 104 may be mounted on the wrist in the manner as shown in fig1 but unlike that shown in fig1 the belt 104 has such a wide area of contact with the wrist that will provide a highly stable fit and good retention characteristic and the thumb holding portion 112 contributes to further enhancement of said stability and retention characteristic thus such belt is meritorious in that it permits the wearer to wear the typewriter on his wrist for a long time without fatiguing the wearer in fig1 the typewriter body 2 is shown as being mounted on the left hand wrist as previously mentioned and features of the typewriter of the present embodiment will now be described with respect particularly to fig1 the operator usually wears the typewriter body 2 on his wrist in the manner as shown in fig1 and whenever a need for conversation arises he may suitably operate the keys 6 and space key 8 on the keyboard 7 to provide a desired message on the recording paper 12 and present to his partner the recording paper 12 as it is discharged through the port 16 whereby the message may be communicated the keys 6 on the keyboard 7 are suitably arranged so that.