An insertion tool for inserting a tracheostoma voice prosthesis member into a fistula between oesophagus and trachea. The insertion tool includes an engagement portion for engaging and retaining said tracheostoma voice prosthesis member to be inserted into the fistula, a gripping portion for gripping a safety strap of said member in a firm grip, a shaft portion adapted to be held by one hand of a user, and a release lever arrangement adjacent said shaft portion for operation by a finger of the same hand as is holding said shaft portion, whereby said release lever, after said member being positioned in place in said fistula by operation of said insertion tool by means of said shaft, is adapted to be operated for releasing said member by one-hand operation. A tracheostoma voice prosthesis member and a method for applying said tracheostoma voice prosthesis member are also provided.