Telescopic mast comprising: - coaxial segments (101_1, 101_i, 101_N) which can be controlled from a stowed position to a deployed position, - a set of guide systems (104, 104P) arranged between the adjacent segments, - a set of systems (105A, 105B; 106A, 106B) for synchronising the segments during deployment, and - a system for driving the segments from the stowed position to the deployed position, and wherein each segment is composed of the same determined number of angle sections secured together and extending over the entire length of said segment, said number of angle sections being at least three, each segment having a cross-section forming a polygon whose angle sections occupy the vertices, each angle section comprising a flat central portion bordered by two side wings, the angle sections of two adjacent segments facing one another, each guide system (104, 104P) arranged between two adjacent segments being attached to one of the angle sections of one of said two adjacent segments and comprising rollers that roll on the central portion of the opposite angle section belonging to the other one of said two adjacent segments, characterised in that the synchronisation system includes engagement systems (105A, 106A) and sequencing systems (105B, 106B) each positioned on an angle section so as to ensure a new drive of one of the segments then a release of this previously immobilized segment, each segment located between the fixed segment (101_1) and the end segment (101_N), comprising at least one engagement system (105A, 106A) and a sequencing system (105B, 106B) attached on one of its angle sections, the end segment (101_N) carrying an engagement system (105A, 106A) and the fixed segment (101_1) carrying a sequencing system (105B, 106B), the engagement system (105A, 106A) of a first segment (101_i+1) cooperating with the sequencing system attached on the angle section facing an adjacent second segment (101_i), the sequencing system of the second segment (101_i) cooperating with the sequencing system attached on the angle section facing an adjacent third segment (101_i-1), the advance of each segment inducing at least securing of one of the engagement systems (105A, 106A) with one of the sequencing systems (105B, 106B) and inducing at least the separation of two of the sequencing systems (105B, 106B). - coaxial segments (101_1, 101_i, 101_N) which can be controlled from a stowed position to a deployed position, - a set of guide systems (104, 104P) arranged between the adjacent segments, - a set of systems (105A, 105B; 106A, 106B) for synchronising the segments during deployment, and - a system for driving the segments from the stowed position to the deployed position, and wherein each segment is composed of the same determined number of angle sections secured together and extending over the entire length of said segment, said number of angle sections being at least three, each segment having a cross-section forming a polygon whose angle sections occupy the vertices, each angle section comprising a flat central portion bordered by two side wings, the angle sections of two adjacent segments facing one another, each guide system (104, 104P) arranged between two adjacent segments being attached to one of the angle sections of one of said two adjacent segments and comprising rollers that roll on the central portion of the opposite angle section belonging to the other one of said two adjacent segments, characterised in that the synchronisation system includes engagement systems (105A, 106A) and sequencing systems (105B, 106B) each positioned on an angle section so as to ensure a new drive of one of the segments then a release of this previously immobilized segment, each segment located between the fixed segment (101_1) and the end segment (101_N), comprising at least one engagement system (105A, 106A) and a sequencing system (105B, 106B) attached on one of its angle sections, the end segment (101_N) carrying an engagement system (105A, 106A) and the fixed segment (101_1) carrying a sequencing system (105B, 106B), the engagement system (105A, 106A) of a first segment (101_i+1) cooperating with the sequencing system attached on the angle section facing an adjacent second segment (101_i), the sequencing system of the second segment (101_i) cooperating with the sequencing system attached on the angle section facing an adjacent third segment (101_i-1), the advance of each segment inducing at least securing of one of the engagement systems (105A, 106A) with one of the sequencing systems (105B, 106B) and inducing at least the separation of two of the sequencing systems (105B, 106B).