[en] The pionic radioactivity as possible dominant decay mode of superheavy elements (SHE) with A-odd is investigated. The Q_Π -systematics, dynamical thresholds as well as the competition between the spontaneous pion emission and spontaneous fission are discussed. It is shown that the usual,island around the double magic nucleus ²⁹⁸ (114) is supressed via a deep instability due to the pionic decay mode. An island of relative stability against the pionic dominant decay mode is predicted to be around the magic nucleus ³⁰³ (119).(authors)