We discovered a microplasma generated in a gap of sliding contact and achieved a world-first success in total micro-plasma imaging. We proposed its existence previously (Fig.1) and proved finally the hypothesis. It had a comet like shape with a tail and a horseshoe pattern on it (Fig.2). It was generated even under such extremely low load as 3g and low friction speed as 2cm/s. It is generated for almost all materials of insulators, semiconductors and metal oxide films. This means that we are always with the microplasma in our daily life and in industry.