PURPOSE: To decrease adjustment operations at the time of producing a turret condenser by facilitating assembling of the turret condenser having a turret and slider as moving parts.

CONSTITUTION: This turret condenser 10 has a round dovetail 51 and a rotation preventive pin 47 on the outside surface of a sliding cover 41, has two pieces of projecting parts 43 for engagement or straight recessed grooves 39 for engagement on the inner side face of this sliding cover 41 on the same line as the line of the rotation preventive pin 47 on the center line of the round dovetail 51 and has the straight recessed grooves 39 for engagement or two pieces of the projecting parts 43 for engagement on a line passing the center of a turret substrate 21 and the center of a through-hole 55 formed at this turret substrate 21. The recessed grooves 39 for engagement is formed at the width at which the projecting parts 43 for engagement fit thereto.