2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/85850The problem of a thread whose extremity is beyond the Schwarzschild horizon is discussed. We present a new coordinate system allowing to write the Schwarzschild metric in all regions. The system of coordinates introduced appears to be particulary indicated to study the passage of extended bodies throuth the Schwarzschild horizon,as it is the case of a thread that continues to attach a fisherman to a fish that entered a black hole.6 pages article. French language.Key words: A fish attached to a fisherman by a thread enters a black holeGeneral Physicstext