Method of production of modified conjugated diene rubber

A method of production of a modified conjugated diene rubber, comprising:

• a first step of causing an aromatic compound having three or more carbon atoms directly bonded to an aromatic ring that forms the aromatic compound to react with an alkali metal compound so as to obtain an alkali metal-reacted aromatic compound;
• a second step of polymerizing a monomer at least containing a conjugated diene compound by using the alkali metal-reacted aromatic compound so as to obtain a conjugated diene rubber having an active end;
• a third step of causing the active end of the conjugated diene rubber having an active end to react with an activity control agent so as to obtain a conjugated diene rubber reacted with an activity control agent;
• and
• a fourth step of causing the active end of the conjugated diene rubber reacted with an activity control agent to react with a modifier having an alkoxy group and a halogen atom-containing group so as to obtain a modified conjugated diene rubber,
• wherein the activity control agent is a compound represented by the following general formula (3) and/or (4):
• wherein each of R12 and R13 in the general formula (3) independently represents a hydrogen atom or a C1 to C10 alkyl group;
• and each of R14 to R17 in the general formula (4) independently represents a hydrogen atom or a C1 to C12 alkyl group.