Chair type massager

1. A chair type massager comprising:

a seat part on which a person to be treated sits on;

a backrest part with a reclining mechanism that performs raising/tilting operation;

right and left armrest parts in which arms are placed;

air bags provided at the armrest parts, the air bags holding the arms placed in the armrest parts by being swelled by air supplied from an air supply pump;

a control part for controlling the raising/tilting operation of the backrest part and air supply into the air bags; and

a manipulation part for giving instructions to the control part,

wherein, when controlling the reclining mechanism to tilt the backrest part in response to an instruction from the manipulation part to perform an arm stretch operation, the control part controls the air supply pump such that the air is supplied into the airbags in a first manner before the backrest part is being tilted, a second manner while the backrest part is being tilted, a third manner while the backrest part is tilted at a threshold angle and a fourth manner while the backrest part is being raised, and

wherein at least two of the first manner, the second manner, the third manner and the fourth manner are different from each other.

2. The chair type massager of claim 1 , wherein the air is supplied into the airbags continuously in the first manner and intermittently in the second manner.

3. The chair type massager of claim 2 , wherein the air is supplied into the airbags continuously for several seconds and then the air is exhausted from the airbags in the third manner.

4. The chair type massager of claim 3 , wherein the air is not supplied into the airbags in the fourth manner.