A wireless communication method comprising: transmitting, by a transmitter, a first code block and a first control signal which specifies a modulation and coding scheme applied to transmission of the first code block from among a first number of candidates for a modulation and coding scheme to be applied to new transmission; and retransmitting, by the transmitter, the first code block together with a second code block using a modulation and coding scheme selected from a second number of candidates for a modulation and coding scheme to be applied to retransmission where the second number is more than one and less than the first number, while transmitting a second control signal that includes retransmission code block information but does not include scheme information for specifying the selected modulation and coding scheme; wherein the first control signal includes size information of a transport block; the retransmission code block information includes assignment information that indicates a number of resource blocks assigned for retransmitting the first code block; the retransmission block information includes a bit map that specifies which of a plurality of code blocks that are transmitted together is a retransmitted code block, a certain bit of the bit map displays whether certain code blocks corresponding to the certain bit are retransmitted code blocks or whether the certain code blocks are first transmitted code blocks, the transport block is divided into a plurality of code blocks, and the first code block and the second code block are each one of the plurality of code blocks, and each of a plurality of coding schemes used in the second number of candidates for the modulation and coding scheme corresponds to a particular range from among coding rate ranges, the coding rate ranges having no overlaps therebetween, the wireless communication method further comprises: estimating, by a receiver, a coding rate for the retransmitted first code block on the basis of the size information and the number of resource blocks of the assignment information; specifying, by a receiver, a coding scheme corresponding to the coding rate from among the plurality of coding schemes; and decoding, by a receiver, the first code block by blind decoding using the coding scheme corresponding to the coding rate. transmitting, by a transmitter, a first code block and a first control signal which specifies a modulation and coding scheme applied to transmission of the first code block from among a first number of candidates for a modulation and coding scheme to be applied to new transmission; and retransmitting, by the transmitter, the first code block together with a second code block using a modulation and coding scheme selected from a second number of candidates for a modulation and coding scheme to be applied to retransmission where the second number is more than one and less than the first number, while transmitting a second control signal that includes retransmission code block information but does not include scheme information for specifying the selected modulation and coding scheme; wherein the first control signal includes size information of a transport block; the retransmission code block information includes assignment information that indicates a number of resource blocks assigned for retransmitting the first code block; the retransmission block information includes a bit map that specifies which of a plurality of code blocks that are transmitted together is a retransmitted code block, a certain bit of the bit map displays whether certain code blocks corresponding to the certain bit are retransmitted code blocks or whether the certain code blocks are first transmitted code blocks, the transport block is divided into a plurality of code blocks, and the first code block and the second code block are each one of the plurality of code blocks, and each of a plurality of coding schemes used in the second number of candidates for the modulation and coding scheme corresponds to a particular range from among coding rate ranges, the coding rate ranges having no overlaps therebetween, the wireless communication method further comprises: estimating, by a receiver, a coding rate for the retransmitted first code block on the basis of the size information and the number of resource blocks of the assignment information; specifying, by a receiver, a coding scheme corresponding to the coding rate from among the plurality of coding schemes; and decoding, by a receiver, the first code block by blind decoding using the coding scheme corresponding to the coding rate. estimating, by a receiver, a coding rate for the retransmitted first code block on the basis of the size information and the number of resource blocks of the assignment information; specifying, by a receiver, a coding scheme corresponding to the coding rate from among the plurality of coding schemes; and decoding, by a receiver, the first code block by blind decoding using the coding scheme corresponding to the coding rate.