Disclosed herein is a plasma generating apparatus 100 including a body 110 having a storage space 115 for storing a sample 1 and a nozzle 190 formed in one side surface of the body 110 such that air in the storage space 115 can be discharged through the nozzle 190. The body 110 includes a skin member (Fig. 2,120) and a flexible electrode portion (140), a heat sink layer (130) and a breathable layer (150). The flexible electrode (14) generates a plasma with respect to the sample 1 by causing a discharge. When air in the storage space 115 is purged through the nozzle 190, the body 110 contracts and the electrode portion (140) becomes closer to the sample 1.