A method for synchronizing in a TDMA frequency-hopping ad-hoc telecommunications network wherein slots includes at least one dwell of set duration and a guard time at least equal to the maximum propagation time in the network are respectively reserved for the emissions of one particular piece of equipment of the network, comprising: a first step of periodically allocating at least one slot per piece of equipment of the network for the transmission of a beacon, a second step wherein the beacon is emitted, a third step wherein each first piece of equipment of the network estimates a time difference Δt from a start time of the slot and from an actual reception time of the beacon, and a fourth step wherein the first piece of equipment of the network uses the time difference Δt for the reception of data slots sent by the second piece of equipment of the network.