A terminal apparatus (1, 1A, 1B) includes: a receiver (10) configured to receive preamble index information on a physical downlink control channel; and a transmitter (10) configured to, in a case where the preamble index information indicates a prescribed value, select a block from one or more blocks to transmit a random access preamble based on the block selected, and in a case where the preamble index information indicates a value other than the prescribed value, transmit the random access preamble corresponding to a preamble index indicated by the preamble index information, wherein the block includes four OFDM symbols to which at least a synchronization signal and a physical broadcast channel are mapped.