Jesus is referred to as the “Son of Man” 88 times in the New Testament. In fact, Son of Man is the primary title Jesus used when referring to Himself (e.g., Matthew 12:32; 13:37; Luke 12:8; John 1:51). The only use of Son of Man in a clear reference to Jesus, spoken by someone other than Jesus, came from the lips of Stephen as he was being martyred (Acts 7:56).
Ezekiel is called son of man many times but this is the Hebrew ben Adam. In Daniel 7:13-15 the title Son of Man is used of the coming one (Jesus) and in Aramaic is bar ĕnâsh which is only used of Yahweh. So when Jesus uses this Aramaic title in Matthew 26:64 the High Priest lost the plot. He said that Jesus had blasphemed and that he should be put to death. We know that Jesus must have used the term bar ĕnâsh becuase if He had used ben Adam the High Priest would not have reacted as he did.
Bar ĕnâsh is only used once in the Old Testament for Son of Man. So when Stephen in Acts 7:56 uses the same term again speaking of seeing Jesus at the right hand of God they go and stone him.
Son of Man is a Title of Humanity.
Other titles for Christ, such as Son of God, are overt in their focus on His deity. Son of Man, in contrast, focuses on the humanity of Christ. God called the prophet Ezekiel “son of man” 93 times. In this way, God was simply calling Ezekiel a human being. Son of man is simply a periphrastic term for “human.” Jesus Christ was truly a human being. He came “in the flesh” (1 John 4:2).
Son of Man is a Title of Humility.
The Second Person of the Trinity, eternal in nature, left heaven’s glory and took on human flesh, becoming the Son of Man, born in a manger and “despised and rejected by mankind” (Isaiah 53:3). The Son of Man had “no place to lay his head” (Luke 9:58). The Son of Man ate and drank with sinners (Matthew 11:19). The Son of Man suffered at the hands of men (Matthew 17:12). This intentional lowering of His status from King of Heaven to Son of Man is the epitome of humility (see Philippians 2:6–8).
Son of Man is a Title of Deity.
Ezekiel may have been a son of man (ben Adam) , but Jesus is the Son of Man. As such, Jesus is the supreme example of all that God intended mankind to be, the embodiment of truth and grace (John 1:14). In Him “all the fullness of the Deity lives in bodily form” (Colossians 2:9). For this reason, the Son of Man was able to forgive sins (Matthew 9:6). The Son of Man is Lord of the Sabbath (Mark 2:28). The Son of Man came to save lives (Luke 9:56; 19:10), rise from the dead (Mark 9:9), and execute judgment (John 6:27). At His trial before the high priest, Jesus said, “I say to all of you: From now on you will see the Son of Man sitting at the right hand of the Mighty One and coming on the clouds of heaven” (Matthew 26:64). This statement immediately ended the trial, as the court accused the Lord of blasphemy and condemned Him to death (verses 65–66).
Son of Man is a Fulfillment of Prophecy.
Jesus’ claim before the high priest to be the Son of Man was a reference to the prophecy of Daniel 7:13–14, “In my vision at night I looked, and there before me was one like a son of man, coming with the clouds of heaven. He approached the Ancient of Days and was led into his presence. He was given authority, glory and sovereign power; all peoples, nations and men of every language worshiped him. His dominion is an everlasting dominion that will not pass away, and his kingdom is one that will never be destroyed.” Daniel saw glory, worship, and an everlasting kingdom given to the Messiah—here called the “Son of Man”—and Jesus applied this prophecy to Himself. Jesus also spoke of His coming kingdom on other occasions (Matthew 13:41; 16:28). The author of Hebrews used a reference to the “son of man” in the Psalms to teach that Jesus, the true Son of Man, will be the ruler of all things (Hebrews 2:5–9; cf. Psalm 8:4–6). The Son of Man, in fulfillment of Old Testament prophecy, will be the King.
The church has focused on the titles Messiah, Lord and Saviour to name a few and we do not hear teaching about the title Son of Man. How it links back to the Old Testament where it plays a major role in prophecy for the end times with the rise of the Antichrist as shown in Daniel.
Son of Man can be found 107 times in the Old Testament.
So we can see Jesus is named in the Old Testament as the Son of Man!