This article reviews how French trade union are coping with the neo-liberal policies since the early 1980s. It shows their divergent reactions, and how these liberal reforms are implemented in a context of transformation of trade union action: the use of strikes is more difficult at the same time as the relationship between trade unions and collective bargaining is transformed in a logic of depoliticizing their strategies of action. These developments did not prevent a resurgence of strikes in the 2000s. It reveals the limits of the trade unions' power of political influence, that implies the use of collective action. However, strikes have declined further in recent years, revealing the weakening of trade union mobilisation power.