A twin clutch controlling apparatus which includes a multi-speed transmission having a plurality of gear trains between a main shaft (6, 7) on the input side and a countershaft on the output side, a shift actuator for carrying out changeover of a shift stage of the multi-speed transmission, a twin clutch configured from an odd number stage side clutch and an even number stage side clutch for connecting and disconnecting power transmission between the transmission and an engine, a clutch actuator for controlling the twin clutch, and a manual operation clutch capacity arithmetic operation section for converting an operation amount of a clutch manual operation means to arithmetically operate a manual operation clutch capacity arithmetic operation value (tqcltmt) corresponding to the manual operation, the twin clutch controlling apparatus comprising: a manual operation clutch decision section for determining with which of a clutch capacity (tqc1, tqc2) of the odd number stage side clutch or the even number stage side clutch the manual operation clutch capacity arithmetic operation value (tqcltmt) is to be interlocked, wherein the decision by the manual operation clutch decision section is executed at least based on a target gear position (gptgt) and a gear position (gearpos) at present; and characterised in that the gear position (gearpos) at present includes a position at which both of an even number stage side gear and an odd number stage side gear of the multi-speed transmission exhibit an in-gear state and a position at which only one of the odd number stage side gears or the even number stage side gears exhibits an in-gear state, and the manual operation clutch decision section carries out, when the gear position (gearpos) at present is the position at which one of the odd number stage side gears or the even number stage side gears exhibits an in-gear state, a decision to interlock the manual operation clutch capacity arithmetic operation value (tqcltmt) with the clutch capacity (tqc1, tqc2) on the side on which the in-gear state is exhibited. a manual operation clutch decision section for determining with which of a clutch capacity (tqc1, tqc2) of the odd number stage side clutch or the even number stage side clutch the manual operation clutch capacity arithmetic operation value (tqcltmt) is to be interlocked, wherein the decision by the manual operation clutch decision section is executed at least based on a target gear position (gptgt) and a gear position (gearpos) at present; and characterised in that the gear position (gearpos) at present includes a position at which both of an even number stage side gear and an odd number stage side gear of the multi-speed transmission exhibit an in-gear state and a position at which only one of the odd number stage side gears or the even number stage side gears exhibits an in-gear state, and the manual operation clutch decision section carries out, when the gear position (gearpos) at present is the position at which one of the odd number stage side gears or the even number stage side gears exhibits an in-gear state, a decision to interlock the manual operation clutch capacity arithmetic operation value (tqcltmt) with the clutch capacity (tqc1, tqc2) on the side on which the in-gear state is exhibited.